Correct me if I'm wrong but didn't the Saturn version offer additional colors? For instance Rogue had a yellow and blue palette swap.
Was this exclusive to Saturn or was it in the Japanese PS1 version as well? I couldn't find it on any North American release be it Arcade or the busted PS1 version (US). Those versions Rogues alt color was only red and yellow but Saturn had like 5 variants AFAIK.
Marvel Super Heroes vs Street Fighter with its long ass title also had more colors mainly Spidey orange and white.
Assuming this to be the case it's part of the reason why I'm excited for the Saturn version of this core. Some say just play CPS2 versions for the MiSTer but Saturn does offer a feature here that the Arcade doesn't have and it's a close, Arcade perfect port to boot!