The FX is fatter, less of a taper at the emitter cone. If they're side by side it's pretty apparent. Sorry, I don't have pics. I think it's the best looking of the FX sabers though, and if you sneak it in among LEs it won't stand out like a sore thumb or anything. I had a BD Maul LE and it looked kinda iffy to me, so the FX doesn't suffer much, comparison-wise.