At its core I believe Driver 3 isn't a bad game, its just too rushed and slapped together at the last minute. Pity they didn't remedy this for the PC release, but I can't say I'm suprised. It amuses me how some reviewers complained about the handling of the cars, yet praised it in the older incarnations. I think the key thing is you have to NOT compare it to GTA whilst playing it. They are not the same game.
As for the violence it looks the same to me.