What is more important is the users accuracy with a certain firearm. You can give a match grade 1911 to someone who does not shoot a 1911 well and they will be all over the place, where as if you gave them a Glock, theyd be spot on.
Certain people do not do well with certain guns. They are all accurate ENOUGH for real world work, which is what they are made and designed for primarily. I don't care which gun you prefer, but you should be able to make a combat effective hit with it at 100 yards.
If you are not interested in self defense.. than I have to beg the question why you would be even looking at Sigs, Glocks, ect... when there are guns much better suited for target shooting.