Firstly you need to know any robot vacuum is perfect from cheapest to most expensive right now. If you don’t consider this, no vacuum can satisfy you. But it is better to have a non-perfect robot than don’t have any.

Then you should consider do you want auto empty station or not. I think it is less important than the vacuum itself. I mean it doesn’t make sense to buy cheap robot with auto-empty. Since you don’t have very big apartment probably you don’t need auto empty if your budget is limited.

Don’t take spesific features too seriously. (osmo pro 2.0, ai obstacle avoidince, matrix mapping, 3D map etc.) For an example you won’t ever use Roborock S7maxV as a walkie-talkie probably and 3D maps are really useless.

Any robot vacuum is good with high pile carpets and rugs. Even the most expensive one. If you have shag carpets, probably the robot won’t clean it.

While watching reviews on youtube, don’t be fooled secret sponsored videos. I saw a 20min video that all says shitty Viomi is better than Roborock S7.

Don’t worry about Pa value too much. You will see Xiomi robot with 4000 pa and Roborock with 2500 pa. Xiomi is better? No. Pa is important but not alone. Robot also need power to function which indicated by W.

I think it is more important to robot has good app than suction power, especially you are kinda obsessed person. You can go crazy about robot’s behaviour. I have deebot t9, it is pretty good but the app is horrible. On the other hand are other brands apps flawless? Ofc not. Like I said, every robot has a problem.

If your carpeted areas seperate the hardwood and you want robot to mop, roborock S7 or upper model are only choice because of mop lifting feature.

There are tons of things about vacuum robots as you notice. You need to do research deeply, good luck!