Production is scored minor only, standard and Classic are not, that's a fair difference, unless of course you shoot all A's. The difference between a 8 round gun and a ten round is pretty minor when the courses of fire are all pretty much 6 round stages or 6 round strings, and if you think you need the extra 4 rounds to complete the string you probably aren't going for HHF anyways. Other than the single stack mags the two guns are not significantly different.