TP-Link Deco X20 4G Wifi 6 AX1800 Whole Home 1800 Mbps Mesh Router (White, Dual Band)

Which is nice mesh router for higer speeds 500 mbps support?

Now i want to by one mesh router only.. Later when needed i will add few to it

I had a very nice plan with act.. 8+4 free going on since many years.. So i wont cancel it 

How To enter into mesh ecosystem.. Which router to buy? 

Regular X20 without 4G should be good enough for most people as it supports 2.4GHz and 5 Ghz which is all people need. If you can run an ethernet cable between the two X20 mesh routers (called wired backhaul) then it is a perfect setup and you can live worry free for years. If you can't run an ethernet cable between the two and still need speed then go with XE75 like i did. It also has 6 Ghz band which can be used for dedicated wireless backhaul so you get maximum performance (almost as good as running an ethernet cable). Even if your devices don't support WiFi 6E, it still makes sense because mesh systems talk to each other and they both with have 6Ghz interruption free to talk.

See this model is available for 4999/- and looks the difference is only it doesn't support 4G (nano-sim).  Feel 4G may not help much especially when multiple devices are connected but as a backup option is good.

Or any other differences are there?

https://www.flipkart.com/tp-link-deco-x20-1800-...

Noob question: how is a mesh router better than regular router?