Windows 10 on Surface RT is Windows 10.Windows RT that comes pre installed is useless.
Windows 10 on ARM is completely different.
So no, a surface rt running windows rt is not the same thing but a bit more useful than a switch running windows 10.
Windows 10 on Surface RT is Windows 10 for ARM devices.
Surface RT can only run Windows 10 for ARM.
Surface RT doesn't have an x86 or x64 compatible CPU.
What you want is impossible.
Impossible is nothing. ©