Crossover Pro is more set to run things like Microsoft Office, where Games adds in DirectX support so you can play things like WoW, EVE Online, and I even saw a link to Bridge Commander instructions in there.
I've personally gotten the SFC 1 and 2 demos running under Wine, but I haven't tried SFC 3 or any other full versions of the games.
Downloaded and signed up for the code for Crossover Games, figured that it'd also give me support for running Gmax, (that doesn't use hardware locks like my old copy of 3dsMax does, and I'm not enough of a masochist to try and get Sentinel running under Linux).
Once I do get it all going though (including 3dsmax) it'll be "bye-bye Windows" for me.
My thoughts on Vista are pretty clear:
"Vista? To upgrade my computer? I'm sorry, I must've misunderstood you.. did you say Upgrade, or Downgrade?"