Back when Beretta got the contract to supply the U.S. military and became the M9, it won primarily on cost which amounted to several dollars per weapon less than the Sig Sauer P226. That being said, even the military required to carry the M9 aren't crazy about it. Special Forces units that are allowed to carry non standard issue weapons either carry Sigs or custom 1911 pistols.
My jobs have required me to carry daily for the better part of my life starting with Smith and Wesson revolvers and evolving into modern double action semi autos. When the department I worked for transitioned to semi autos, I was one of a handful of testers who literally used and abused various weapons daily for months, shooting tens of thousands of rounds. Guns included Glocks, Smith and Wesson semi autos, Beretta, Sig and H&K. The only 2 weapons to survive our abuse and fire time after time without fail were the Sig (P226) and the Glock.
I personally don't care for the Glock just because it doesn't fit my hand well, but otherwise it is a great weapon. The department went with the Sigs, partly because of the fact that the Glock didn't have either a manual safety or a full double action pull required for the first shot, and was considered a safety risk by management types.
Much of your decision would have to depend on what your uses for it would be. Plinker, carry weapon, home defense? I've put a lot of rounds through Beretta 92's and enjoy it for target shooting and general plinking. As far as a weapon I'd stake my life on, I'd go with a Sig or Glock.
I know I didn't really answer your questions, but I thought I'd muddy the water a bit further.