no there are alot of similer things. they were sued because how close in design they are not just the one change. you can put the S&W slide on my Glock, it won't fire but thats kinda odd how it will fit.
only 200 rounds? i easily have 15,000 at least through mine. my gun did brake once though. me and Ttemper where at the range and my slide wouldn't lock back anymore when i was out of ammo. there were 2 pins that broke and fell out, even broken that weapon never stopped fireing. that made me feel real good so i know that that thing will always work when i need it too broken parts or not.