Comparing SAS to Marvel is bad, unless you mean Saga for it's fast playing ability and general Heroic feel of the system. The old Marvel though, I would say Mutants & Masterminds is more easily compared to it than SAS. Seems like a D20 conversion of Marvel to me, with some great modifications to make it playable. LOL. I think from what I have seen M&M is the D20 SUpers to beat followed by Deeds Not Words and 4CTF.