As mentioned (by Beretta55 I believe), GTA:VC and The Getaway are two completely different projects with only a handful of similarities - You drive cars, you run around, and there's some shooty bits in-between...
The Getaway is a lot more serious when it comes to graphics and gameplay. Although it's possible to compare the two, I doubt it should be done. Vice City is for those who prefer to just pick it up and create havoc. The Getaway is a lot more challenging in this department from what I know, and if it's anything like Mafia turned out, you'll probably cork it after a few shots anyway.
Bottom line - they're both different and shouldn't be compared this way. Let's just wait until it's out and let the punters decide. My vote? Come on GTA!