I think the G2 party would be better. The grates on the gator are only 1.5" wider I believe and both are deep enough for full pans. more flexability with the extra height and grates with the G2. plus the skin should hold up better and the charcoal basket is much improved.
G2 party is going to be more expensive (400?) I have a G2 chubby on the way but Im thinking of upgrading to a gater. I havent seen the G2 Chubby in person yet but on paper I would think it goes
G2 Party>Gater>G2 Chubby