This debate about C8 seats raged on for some time, in the beginning when pretty well NOBODY ordering a 2020 was able to sit on and try out any of them, including me so I read everything I could. The consensus back then seemed to be:
1. the comp seats were for track application however your body shape couldn't be too wide at the hips, otherwise if was a very tight/uncomfortable fit and you'd especially pay the price if using the car as a daily driver or on long trips. But those with narrower hips, were usually OK with the competition seats. But they definitely "hug" you more with the side bolsters and provide a firmer feel
2. Murray was one of the few who spent a few hours in both the GT1 and GT2 seats, "back in the day" and was adamant that each were just as comfortable. I've seen many others describe the GT2 seats as more comfortable pointing to what they assumed to be higher density foam and more support, so perhaps (?) it comes down to preference??? Either way, it sounds like the 2 might be fairly similar although as Murray says, they have a different look
3. if you order the 2LT package, you get heated/cooled seats with adjustable bolsters, so regardless of whether you have the GT1 or GT2 seats, the trim level will influence how the seat is set up
4. and yes, if you want the 2-tone interior, you MUST order the GT2 seats (or competition seats).
Here's a photo comparison, compliments of GM; hope this helps out:
[ATTACH=full]76917[/ATTACH]
