I think it's difficult to be honest. I prefer to race GT2's because I am better at them and faster though I do think it's a good challenge to race TBO's as well. CTRA2 is one of the few places where you do get that style of racing and its a different skill. A lot of people at CTRA with Silver+ licenses like them as well as GT2's.....
Sometimes if I have too many TBO races and I don't want that any more, I go to the bump n jump or Single Seater servers for a change