Recoil wise they are also different. The FNS has a slightly lower bore axis which helps with felt recoil. Trigger reset is similar, but the FNX's SA trigger is lighter than the FNS's trigger (also, the hinged trigger takes a little to get used to if you are not accustomed to the feel of hinged triggers). With the FNS, you have the same trigger weight every time. If you decock the FNX, you'll get a long and heavy first shot and the rest will be much shorter and a lot lighter.