Hand size is everything. The 1911 fits my hand much better, has a better trigger, and I still own it. There is no question in my mind but that the 645 is a better gun for someone whose hand it fits well. More reliable, doesn't need upgrading because it already has what it needs. I did have a friend who had one with adjustable sights, and it was also more accurate than mine for some reason. But mine was good enough.

But if a 1911 is faster to shoot ( in your hands) and easier to carry, what can you do?