Don't have a PS2, and I haven't seen much other than what the commercials advertise. Sequels or spinoffs of some popular games don't always end up being as good as their predecessors. If they don't variate enough in the new one, I'd imagine it'd be pretty dull to someone who's played GTA3.
yeh, I played for an hour or so, it was quite the same really, like you said! in most cases a sequel is not as good as the first one, which most people know