> 2.) Does MAME SWL not save individual game controller Cfg files? Seems when I change
> my controls in one game, they stick to the next game and when I update my controls
> for the current game they overwrite the controls for the previous game even though
> I'm using "Input [this Machine]"
Configs are still per-system. Per-softlist is an excellent idea that nobody's actually implemented yet.
> 3.) Is there no difference between the games on Neo-Geo AES/MVS? Yeah, I realize one
> is the home console and one is the arcade machine. But is there nothing different
> beyond that? Also, I know how to get blood in Metal Slug for MVS, but is there a way
> to do it in AES?
AFAIK the AES/MVS differences are very limited; that was pretty much the entire marketing message for the AES
I think if you select the Universe BIOS you can get blood for Metal Slug on both MVS and AES.
> 4.) Is this MAME compatibility list reliable? It seems to be kept up to date.
It's reasonably fair. It omits that the vast majority of NES, GBA, and SNES games do actually work fine, and the inverse text bugs on the Apple II were fixed long ago. (16-bit unaligned access on GBA is fixed now as well).
And of course development on Model 2 is rapidly outpacing what they wrote there.