I actually think they are different. Ithink in like 02 they got bigger. My friend has a 99 GT and it is smaller than mine for sure. Also they have a different wing and side scoops too. So yea i think they are different.
I vote that they are different as well. The 2001 newer are slightly taller and mount differently. The 35th are mostly held on with double sided tape and like one or two studs I think. The other has like 7 mounting studs. In catalogs the 35th is cheaper too I think.
I've compared mine side by side to a 2001+ and mine looked to be almost two inches smaller Luckily I opned the hoods and found mine to have double the hp, lol