@XManag3r There's no such thing as a 'stronger version' when it comes to WiFi. There will be slight differences between different products, but big stone walls are good at absorbing things and are...

@alberto12 All Decos work with each other.

@ConcernedUser WiFi 6 has lower latency, not as low as 7 though. Sure, unless you have clients with 6 or 7 it won't make much difference. X90 is tri-band, more antennas, more streams so it may help....

@ConcernedUser X20 isn't going to do much for you. WiFi 7 is supposed to have lower latency.

@ConcernedUser More Ethernet cables=better network performance, so if you can at least connect the nodes via Ethernet that will work much better.

@stuartlowb All Decos are compatible with each other. Any 'X' models are better than the M9. (Except maybe the X10.) See https://www.tp-link.com/au/home-networking/deco/