Yup - shoot 'em all! I have both - Glk 17 & M&P fullsize. If aftermarket parts are not an issue (Glock has much more aftermarket available) I like the M&P better! Thousands of rounds through both, without any problems. What it comes down to is which fits your hand better. I'd just like to ad here that the 1911 trigger is the absolute best for competition (I'm sure some will disagree) but the single action, very short pull, clean break is hard to improve upon.
I know this is not much of an answer to your question, it's like which is better a ford or a chevy??
The fit to your hand is what should guide you. Good luck & remember you cannot practice 'too much'!