Thinking of buying these

I live in a 110 m2 house with concrete walls.

I have ftth 500mbps connection. The isp router is on one end of the house so at the bedrooms I get signal but not speed (10mbps out of 500). I have an ethernet connection from the router to one of the bedroom and was thinking of buying the 2 kit

. My plan is both wired one next to the router (and completely disable the router wifi) and one at the bedroom. Near the isp router is my office where I have my PC and where gaming takes place while the bedrooms only need to stream movies.

Could possibly go with only one device at the bedroom but I don't want to have to change networks and I fear compatibility issues with same ssid on the router and x10

What you guys think?