Do we know how a high level TIE compares to a mid level normal? For instance is TIE with a 10 enthusiasm going to allow you to play the same as if you had a 5 enthusiasm and played normal?
It's been my experience that my players play as well or better, on TIE with high enthusiasm. I'd expect results to vary, however.
If you think of a BB game as a series of coinflips, CT makes the coin weighted to your advantage -- and TIE the opposite. Given the random factors, you can never be 100% sure. High enthus makes your players better, but whether it will make them good enough to miss a few extra shots against the opponent will depend on who you're playing.