Nomercy the 22/45 i have now will out shoot my old MKII . i have been extremely impressed with the groups it shoots.
the actual mechanical parts of the two are pretty much the same. the recievers are the same . the bbls are the same . just the base or slide is different. one is zytel and the other is stamped metal.
either is a great pistol.
i just like the feel of the 22/45 in my hand. and that is big part of shooting well.