Yep, what Callum said, but I think you'll find the GT-TR is the heavier luxury model, over the GT-T, I've wrecked both over the years.
Are you sure on that? All the ones I have looked at the GT-T has more options like electric windows, more luxurious seats etc. You have probably seen more than me though.
Didn't present a problem for me though, I started with the GT-TR but there isn't a lot left now.
Callum
PS - I'm sure the GT-TR badge will look better on my starlet than the GT-T one.