From what I understand (and I could be wrong here) Raine emulates less but has less overhead - i.e. you don't need as much CPU power to run at full speed, good for old hardward. In this respect Mame goes for quantity. Also I think people can argue that Mame is really to document while Raine was built to play the games. I hope I don't start anything with that comment, it's just been my observation from reading posts....