Choosing a WiFi router, looking towards AX and Mesh routers, which standards and router are better?

Question

Computer networks

Hello, I recently set out to update my old equipment, (or maybe not update it, but reconfigure how to tell me here)
Recently I asked a question about the AirPort TimeCapsule and, alas, it turns out not my option, eh ....

In general, to the point, since I haven’t watched for a long time in the direction of all standards and routers, then he began to stubbornly google what's new. I found that there are Mesh systems - seamless roaming - very cool for me, because now D-Link 825 10 years ago and Zyxel Keenetic Giga about 10 years ago are not connected even in Router-Access Point mode - well, that is, I have 2 wifi network, unfortunately then I was not fond of tricky firmware and it was not possible to buy 2 D-Link, and as it were, it remained so.
What I thought, I can take, for example, in hardcore - a Wi-Fi router ASUS RT-AX88U (stupidly the first one in the list =) ) and assemble a Mesh system on it.
The question is, what second router can I use for Mesh - only Asus? it seems that this topic is protocol-based and depends only on the support of Wi-Fi standards and there should be no problems if I take the second point, cheaper, if the first one does not break through.
I’ll tell you right away why there are 2 points, it so happened that my parents and I have 2 apartments for three rubles on the same stairwell and plus D-Link 825 is in the back bedroom, and it’s already weakly reaching the kitchen, so I just got a Zyxel Keenetic Giga from an old job and through the crutch cut him off via Wi-Fi to receive and distribute the Internet (to tell the truth, sometimes manual reconnection of networks began to piss me off a little). Actually, the zukhel is enough to send an Internet to the second apartment in the kitchen, they don’t ask for more =)
What else can you advise?

From one extreme to another, I also now have another (lay around) Dir-300 flashed with OpenWRT, as well as a D-link DAP 1360U. You can even build something with them, but I think their time has long passed =)

Answer 1

TP-Link Archer C7 (HW v4 if found or v5) + OpenWRT