ZyloxDragon: The BFG edition only. I remember playing the original a few years before, though I didn't finish it. It seemed like there was much more ammo for me in the BFG edition, I didn't have zoom, and I didn't have the handheld flashlight. I know there was a few other changes that some people weren't happy with, but overall it wasn't bad. Just too many enemies appearing right behind you, and some levels that felt just too drawn out.
They also cut some extra video game cabinets that were added to the expansion(the first expansion) in the BFG edition(all of them were changed to turbo turkey puncher), and removed the ability to use any of the mods(even the SP level mods, some of which were decent).....that was why I asked which you played.