Having tried it on multiple different it’s not seamless but it’s a damn sight better than setting up many machines manually
The configurations are not particularly hardware dependant as for the most part NixOS handles drivers and such transparently and just gets whatever it decides is best for your hardware (unless you override it)
The main hardware specific config I have is to use Nvidia proprietary drivers, as it defaults to nouvea
Tl:Dr 90% of your config will transfer and you have to do a little fiddling to get it all up and running but it’s all way easier than building from scratch