One thing to consider is headroom if you plan on tracking the car and you have a long torso. The 'T' will lose a bit less than an inch in headroom, and for me I have the seat bottom pad out and 1/2" dense foam pad down so I can sit in my coupe without having my helmet hit the ceiling. I don't think I could get comfortable in a 'T'. I didn't think about this before I bought the car, I just liked the coupe better, now I am glad I ended up with the bit more head room.