The two have been differently influential since their inception, and taken together are probably the two most influential semi-auto handguns still.
After all, the OP didn't ask us to choose between a 3rd generation S&W and SA XD.
It depends on what one needs a gun to do. For me, it's last resort SD/HD first, range plinking second, barbecue oohs and ahs a distant third.
Give a great shooter the best classic 1911 (i.e., a single stack) that money can buy. Give a box-stock Glock 21 (or just about any other polymer double-stack .45) to another great shooter.
Run a timed drill, 10 targets at 25 yards and closing, simulating incoming assailants. First guy to hit all targets wins.
This doesn't prove a winner for the poll, but it tells me which of the two firearms I want to carry.