Should i get a 2001 Oldsmobile aurora or a 2003 Pontiac grand prix?

I'm looking into buying a used car. My two main options are a 2001 Oldsmobile Aurora, that has less miles and is in better shape mechanical wise, or a 2003 Pontiac Grand Prix, which is a little more beat up, but still fully loaded. It really comes down to negotiating with the seller about either. Whats your opinion on either car?|||I would get the Oldsmobile, as it has lower miles, but the head gaskets will need to be replaced, as it is a Northstar engine. The Pontiac has the Buick V6 engine which is very proven.|||I wouldn't buy either .... go find a Chrysler 300 then you have a car