as one of the guys that shot a Daystate Airwolf Extreme at the EBR last year, I think that there are two advantages to FX.
1. the smooth twist barrel is less effected by wind, and there was a lot of it last year.
2. at 45 FPE the time the pellet spent in the air effected my pellet more than a gun shooting at say 60+ FPE
Another I think is the expense, Daystate is expensive but you get what you pay for.
I was surprised to make the finals the way the wind was blowing, and I could watch the pellet go in every direction as it traveled down range.
I am very pleased with the performance of my Daystate and I knew that my gun was a bit under powered for the 100 meter competition considering the wind.
this is my opinion.
Mark