But as I understand it, sidearms special is just missing the Hucard music?
Yep, the original game is there but has an arranged soundtrack. The BC mode is much more forgiving, you change weapons Gradius style. But it can't be played on an Express since it's a disc.
So that's why I'd like to pick up the HuCard version again.
EDIT: SMF, yep, I enjoy both Bomberman '93 and Bomberman '94, but I think as far as gameplay goes, '94 slightly edges out '93 in my book. And it can be found for dirt cheap. (It costs less to mod your US system and import '94 than to get US '93, which is dumb. '93 is a great game and a superb improvement over the original Bomberman, which is fun in its own right, but the amount of money it goes for right now is just absurd, imo.)