So, I was really bugged by how had my original van model looked. So I redid it, while still trying to keep the poly count down. I managed to keep it...
Isn't one of them lower resolution ALPHA (DXT3?) and the other related to more bits (like 255) Alpha channel values? So it depends on *which* purpose...
Personally I'll take proper physics with train handling and such, over eye candy any day. That's why occasionally I'll run TSW3 or what ever for that...