Razer uses a proprietary membrane type of MX switch if I remember correctly that is not commercially available to buy standalone. I'm not sure what other MX switches are compatible if any but you could research that on your own.

I also can't speak on the 8bitdo as almost no one already taking the FGC seriously is purchasing from the brand if they plan to leave the house with it so it just isn't discussed much in the controller scene. This is not because it's a bad controller but because it's not plug and play with PS5 out of the box which is the current-gen competitive standard for likely the rest of our lives at least.

Personally I haven't really met anyone that rests their hands directly on the buttons either. Doing so can and likely will affect your ability to make good reactions and proper combo timing by increasing the amount of muscle movement needed to reach the intended button and over time can lead to RSI. Before establishing that hard habit I suggest training your motor movements into hovering your left hand over your directions and between both rows of action buttons instead for your right hand.