I have a P226 and two 92s, a full size and a Centurion. If any one of them is more accurate than the others, I can't tell. I suspect that they all shoot better than I do.
The first consideration in picking between them is your subjective evaluation: how you like the way each fits and feels.
If it's still a tie, keep in mind that hi-cap mags for the Beretta are generally cheaper and easier to find.
My recommendation, obviously, is to get one of each. No regrets about the one you didn't get.