It's not only a matter of lap time... Maybe FXR is as fast as FZR in this track but there are alot of things you have take into account to know which one you shoud choose
+ FXR
- Easier (less likely to spin)
- Less fuel in tank, faster in the first laps
+ FZR
- Won't flip over (in this track it's pretty important...)
- Doesn't burn tires as much as the FXR
It's up to you to know which one suits you the most