for my Brocock the difference is accuracy. It really likes the FX, still looking for an NSA that is acceptable. I would say try both, but really you'll need to try 2 or 3 NSA or more as there are so many options. I have taken squirrels out to 80 yds with the FX, it sounds like you hit a tree branch on impact, but it was all squirrel. lots of energy dumped into the target (25 cal). I did some clay block testing, they both expanded comparably at 30yds with comparable wound channels and penetration.