Having been in the back seat, I thought they were the same for legroom...aka nonexistant.
You want leg room, get a Bonneville. The best Pontiac.
Yeah, 97-03 GP's sucked so bad you couldn't even get a heated passenger seat, no real gauges, no boost number on many...just lego blocks. There's a long list. Compare to the Bonneville and the list is endless. Hell the Park Ave went so far ..they gave the rear passengers sun visors!