My Shopping Cart

Roborock S7 vs Ecovacs T9 | Which should I choose?

When two titans clash, the destruction decision is brutal. And as every robovac enthusiast knows, the latest flagship models from Ecovacs and Roborock are likely to be giants in the industry.  Roborock has a cult-like following which speaks for itself, and the T9+ has a feature-list longer than the current “locations of interest” list. However, deciding which is best by reading features and specifications is a little bit like choosing your favourite meal by reading a recipe book.  We have tested, lived with, and learned to love both robots.  This is our expert opinion.

On paper, there are a number of similarities.  Both are circle, hybrid vac+mop combos that use LiDAR as their primary navigation sensor.  They’re two of the only options on the market that have “active” mopping, where the mopping pad is moving to create extra friction rather than just being dragged around the floor.  For the most part, it’s a little bit like trying to separate a BMW and an Audi as the better everyday car.  Both will do an excellent job and you will love whichever one you choose.

So, let’s focus on the differences. Features can often be more confusing than helpful, so I will summarise and highlight the key features that should form the basis of your actual decision at the bottom.

1. Vacuuming performance

Both are exceptional, with ample suction power.  The T9 has more raw power at 3,000 pascals, however the 2,500pa on the S7 is more efficient, as it is lower and follows the contours of the floor, creating a better seal.  There are slight advantages to both approaches: the T9 is a little better at picking up larger objects and the S7 better at finding debris in crevices.  Personally, I wouldn’t make a decision between these two bots based on the vacuuming performance as there’s not much to separate them and both do exceptionally well at genuine deep-cleaning.

2. Brushes

The T9 adopts a more standard bristled roller-brush, while the S7 uses an all-rubber system.  The rubber brush gets less hair tangled around it, although some will still accumulate on the edges.  The S7 also has one rubber side-brush, while the T9 has two standard ones.  Two is better than one, and although the rubber won’t soak up liquid when mopping, it does make extra noise when flicking against the skirting-boards.

3. Navigation

Both robots use LiDAR for positional navigation.  They’re both methodical and gentle on walls and furniture.  The software on both is impressive (coming from someone who is very used to how clever robots are). The T9 is the most quickest robot I have ever tested but again, the S7 is very close.  Both have virtual barriers and no-mop  zones.

4. Mopping

These are two of the only “active” mopping robots on the market.  Most hybrid vac+mops simply drag a wet mopping attachment around, which is useful for maintenance cleaning but doesn’t lift more stubborn spills that have been there a while.  Both also have adjustable water flow rates.

The T9 mop “oscillates” and the S7 uses “sonic, vibration mopping”.  You’re probably not the only one that is confused.  What this actually means:

The oscillations on the T9 mop are larger movements. The whole mopping pad moves back and forth quickly in a scrubbing motion.

The S7 mopping pad vibrates – the movements are much smaller and faster.

Roborock claim that their system is 4x more effective than the standard dragging method.  It makes sense and our tests back this claim up, however the larger scrubbing motion of the T9 makes it even more effective on tough spills.

5. Obstacle avoidance

This is the first big win for the Deebot T9. It uses a secondary laser system on the front to detect items on the floor, below the line of sight of the main LiDAR.  Ecovacs call this TrueDetect 2.0.  It’s particularly useful to help it navigate USB cables and socks (or pet messes…) that are left on the floor without getting them stuck in the brush.  It’s important to note that it isn’t 100% reliable and it’s still best practice to pick up before sending it out to work.

While the S7 doesn’t have obstacle avoidance, this doesn’t mean it blindly bashes into walls and furniture.  The term “obstacle avoidance” can be slightly deceptive in this regard; it is still intelligent and gentle.  It just can’t see items below the line of sight of the main LiDAR and relies a little more on its bump sensor (only a few grams of force require to turn it away if it doesn’t see something).

6. Raising the mop

And now for the first big win for the Roborock S7.  It is the first hybrid robot vacuum that can raise its mop when it detects it is driving on carpet or rugs. Every robot mop owner will immediately understand what this means, but I will elaborate for the newcomers why this is so important.  You see, other robot mops also use ultra-sonic sensors to detect carpet, however as the mop can’t be raised, it will simply avoid driving there as it would make a damp mess.  If the majority of your flooring is hard, or you only have one area that needs mopping and you can find a place for the base, this is probably not an issue.  However, many New Zealand homes will have a mixture of carpet and hard-floors.  Any hard-floor that has carpet between it and the base location essentially becomes an island as the robot will not even transit across it with the mop attached.  Carrying the robot back to base isn’t a huge deal, but it may be something people don’t always consider and not having to think about it at all is another level of convenience and automation.

The Roborock mop only raises 5mm when it detects carpet.  As the sensors are on the front of the robot and the mop is on the back, it is quick enough to detect it and raise the mop.  When I tested it on a bumpy white rug, it did still leave a slight dampness however there were no marks.  It was totally effective in our tests on standard deep pile carpet.

7. Air-freshener and other features

The Ecovacs T9 is the first robot to have an air-freshener and 3D mapping.  The air-freshener smells surprisingly pleasant.  It is subtle – more like an expensive male perfume than a high-schoolers spray-on.  Transforming your floor-plan from 2D to 3D still involves quite a lot of manual set-up, so while it is a cool concept for the future, it wouldn’t really affect my decision making process.  The air-freshener is a little win for the T9, especially for those with indoor pets.

Roborock S7 Plus
Ecovacs Deebot T9+
Price
$1,399 NZD
$1,399 NZD
Battery life
180 mins
175 mins
Navigation type
LiDAR (ultra-accurate)
LiDAR (ultra-accurate)
Cleaning Functions
Vacuum + Mop
Vacuum + Mop
Suction power
2,500 Pa
3,000 Pa
Roller-brush
Rubber
Bristled
Side-brushes
One
Two
Ultra-sonic carpet detection
Yes
Yes
Active mopping
Vibrating
Oscillating
Raises mop on carpet
Yes
No
Auto-empty included
On Plus model
On + model
Virtual barriers
No-go & no-mop
No-go & no-mop
Smart-home
Amazon Alexa, Apple Siri & Google Home
Amazon Alexa & Google Home
Dust-bin size
470ml
420ml
Water capacity
300ml
180ml
Object Avoidance
No
TrueDetect 3D 2.0

Summary and advice.

Overall, the Roborock S7 and the Ecovacs Deebot T9 are very comparable, and it is more a question of what is most suited to your home and what you prioritise.  As I said earlier, for every day users it really is a bit like BMW vs Audi.  Both are exceptionally competent and will shock first time robot users with how well they actually clean.

To me, it comes down to how much I want the convenience of never having to carry the robot to mop (S7) vs the object avoidance (T9).  If I was buying it to vacuum daily and mop once or twice a week, it would be hard to pass over the T9, but if I wanted to mop and vacuum every single day, then the S7 is also great. 

Lachlan Murray

Lachlan Murray

3 Responses

    1. Hi Val! You can indeed. iRobot and Neato are both companies that sell dedicated robot vacuums. Generally speaking however, you don’t usually pay more for the mop. The mop is an attachment piece so you don’t actually have to use it if you don’t want to 🙂 Hope that helps!

  1. We’ve had feedback that the T9 copes better with big clumps of fur. I’m not sure entirely why, but it seems likely that this is either due to the bristled brush or because the lower height (good for most other deep cleaning) of the main rolling brush on S7 pushes the fur around. To be clear: this is only for people with large amounts of fur that is clumped – not just stray fur spread on the ground. Even knowing this, I’d still give a win overall on the brush to the S7 as it tangles less and it copes well in all situations except for clumped pet fur.

Leave a Reply

Your email address will not be published. Required fields are marked *

Trending on RobomateTV

Ecovacs Deebot T8 AIVI Review

Roborock S7 Plus Review

Unboxing the Roborock S7

Keeping everyone safe | COVID19

We are still shipping during lockdown.  Please read below for more information regarding safety and delays.

Vacuum cleaners are classified as an essential service under the government guidelines.  Many robot-vacuum users have mobility issues and those with respiratory conditions rely heavily on them to maintain a healthy home.

We’re doing everything we can in a contact-less environment to keep our team, customers, and community safe.

  • We are still shipping.  During level 4, delivery time-frames are less predictable so expect slight delays (North Island 3-4 days, South Island 5-7 days).
  • Our team is all working remotely.  One person is managing all product dispatches in a 100% contact-less environment.  There is no physical contact between any of our team members or couriers.
  • Courier pick-up and delivery is contact-less at both ends.  Please ensure you provide clear delivery instructions as you won’t be able to sign for delivery.  Please also notify us if your expected delivery doesn’t arrive so that we can follow up.
  • Our office is a COVID traced location (there are no visitors).

Stay safe and be kind. :-) 

Your Robomate team

From our place to yours, totally free.

We’ve got Kiwis backs. Get free shipping across New Zealand on any order over $199!

Fine print

  • Only valid on orders with a total value of over $199 purchased from Robomate.
  • Only valid at New Zealand addresses serviced by our standard courier company.
  • Not valid for exchanges or product returns.
  • Standard shipping only. Overnight shipping may be available at extra cost.
  • All shipping is in accordance with our shipping policy and terms and conditions of sale.

Your happiness is guaranteed.

Getting your first robot can seem a little overwhelming. That’s why you have 30 days to return any robot vacuum if you aren’t totally happy.

Fine print

  • Only valid on robot vacuums purchased from Robomate within the last 30 days.
  • You must return the product in ‘as new’ condition with all items, including packaging.
  • Robot must be returned to Robomate within the 30 day period.  A 10 day grace period may be extended at our discretion.
  • This return offer is only valid once per customer, household, or address, unless approved prior in writing by us.
  • This offer is only valid for domestic use for ‘typical’ in-home cleaning.
  • Accessories are excluded from this offer and our standard returns policy applies.
  • You will need to repackage the robot as it was received, attach a courier label and ensure safe handover to the courier for return.
  • Damage to any part of the product may invalidate this return offer.
  • This offer is for genuine purchasers only, for the sole purpose of evaluating the performance of the robot.  You must be willing to attempt to resolve any issues prior to returning the product.
  • If you select any Finance or Pay Later provider as your payment method at the checkout, a 10% restocking fee may apply if choose to return the robot.

GenoaPay

10 weekly payments.
No interest, no fees.

Checkout with GenoaPay

Credit approval in seconds

Get it now, pay over 10 weeks.

That’s it! We manage automatic weekly payments until you’re paid  off. Full purchase details can be viewed anytime online.

You will need:

  • To be over 18 years old
  • A NZ drivers license or passport
  • A Visa/Mastercard payment
  • To pay the first instalment

Learn more about how it works. Credit criteria applies. Weekly payments will be  automatically deducted. Failed instalments incur a $10 charge. See our Terms & Conditions for more information.

Pay for your robot over 6 weeks.
No interest, no fees.

Simply select AfterPay at the Checkout

Credit approval in seconds

Get it now, pay over 6 weeks.

That’s it! Get your robot immediately and make 4 equal payments over the next 6 weeks.

You will need:

  • To be over 18 years old
  • A NZ drivers license or passport
  • A Visa/Mastercard payment
  • To pay the first instalment
Learn more about how it works. Credit criteria applies. Failed instalments may incur fees. See our Terms & Conditions for more information.

Found a better price? We'll beat it.

Get better specialist care, at the best possible price.   

If you find a better price, let us know and we’ll beat it.

Fine print

  • Only valid on identical brand-new products.
  • Price must be currently advertised by an official New Zealand retailer.
  • Only valid on robot-vacuums, unless specifically stated in writing by Robomate.
  • This offer is only valid once per customer, household, or address, unless approved prior in writing by us.
  • You must provide proof of price, with a link or photo of the product advertised elsewhere.  It must include the price, all product details and the date of validity of the offer.  The product must also be in stock and available for purchase.
  • Robomate may take into account other fees, including (but not limited to) shipping costs.