It is not entirely stock, I replaced most of the springs to bring the trigger pull down a bit plus a fairly light recoil spring (8 lbs) for my powder puff (as my friends call them) minor loads. Other than that all the guts are bone stock. To answer your other question, it's kind of a tough call, there are certain things I like about the one over the other and vis versa. For example, with the Tanfoglio you can get a very high support hand grip due to the slide riding inside of the frame. That was one of the major selling points for me. On the other hand it is very hard to beat the 1911 style trigger and the overall ergonomics of the edge. It just naturally sits very well in my hand. But then again, so does my Tanfo with the henning grips. The best way I could put it is its like comparing a lambo to a Ferrari. Both are freaking fantastic, it just comes down to personal preference. If you can get your hands on a Tanfo to try out, I would highly recommend it. I swear by mine, but then again it never hurts to have both the lambo and Ferrari sitting in your garage ?