looking to pick up a mesh router and am going towards TP-link but am getting confused with all the different Deco's (M9, P7, M5, M4,E4) what is going on here, whats the newest and whats the differences between them?  Went looking for a chart on TP-links website but was unable to find one.  

- what are the differences

-do they all share the same interface (app)

-do any of them have access to be setup via desktop computer or only cellphone

any insight would help.

Thanks