Some MAME games can display different POV screens for players 1 and 2 for the games that had that capability -- if you have a video card that can handle more than one display.
The games you mentioned were single display
* IIRC so all you need to do is put in a video signal splitter like Nephasth did for his Two Headed Beast build.
* Yeah, I know X-Men had two monitors and a mirror, but it
looked like one display and acts like one for MAME.

I think Unstupid built a 2 bartop NEO Geo mini setup where player 2's system plugged into player 1's system for video and controls.

Scott