Hi and welcome to the forum.
Yes, my EFI folders should work with the Maximus X Hero. The only thing that will not work is the SSDT for USB. You will have to create your own. SSDT for USB is motherboard specific.
Yes, the same procedure for swapping Wi-Fi/Bluetooth card will work.
Here is another thread from a
Maximus X Hero user. He had some difficulties with getting his drives seen and I think the solution was in post
#130. It's worth reading through so you don't make the same mistake. Essentially, he came across PCI lanes limitations and his SSDs were both using shared lanes.
I'm still very much an noob and learning new things everyday. The real legends are guys like RehabMan and all the devs who develop Clover, kexts, etc for all our benefits.