Could you do something in the code to indicate that this is not the original? Is there a title screen that could be altered to say "Boulder Dash MR" for Mass Release Edition or something, so that the original could never be mistaken for the ones sold to everyone? Would that be fair?
Hmmm. Because we don't really see that many ports, the port category may be rather sparse. I think the complexity of the issue is when a port is done, it is usually done by high level programmers who are seeking as perfect a translation as they can get on the VCS. Look at the team on Mappy. That's an all star who's who in the 6502 programming scene with commentary and assist by other elite programmers. So you've got a classic game, already well loved and respected, being ported to the VCS by the best of the best. It's a one-two punch that is going to be hard to beat. I have no doubt that Draconian would have swept the year it was released had there been awards.
I like the idea of a Best New Programmer category for people just getting into the game. I think that would help shine light in spots other than just whatever the elite level port of the year might be (looking at YOU Aardvark...)