SC is more unique, interesting, quirky and a ton of fun to play. No other game is quite like it especially playing Assault on the Vault with a token. It's not a particularly good game to use for tournaments though, so keep that in mind. The multiplayer game can get confusing especially when a couple players are eliminated because they ran out of time. They didn't make very many SCs so it's a tougher game to find.
DH is a great game too and quite a bit cheaper mainly because they made quite a few. Great tournament game if that is any consolation. A lot of good modes and Crime Wave which is a very tough wizard mode. Oh and midnight madness too.
Tough call.