If I'm correct, Glocks can handle +p+ ammo on a fairly regular basis, but I would check with one of the boys at Glock HQ first.
I personally have boxes of the Law Enforcement Only Winchester 115 gr. +p+ and Ranger SXT 127gr +p+, and have fired both through my G19. I'm not really worried about it. I'm pretty sure the gun can handle it no problem, but I'm still gonna' give Glock a call soon.
The Glock can definitely handle higher pressures than the Beretta can. There is no comparison. Don't forget that the Glock also has a polymer frame that soaks up much of the recoil by flexing. Aluminum-framed guns take much more of a pounding.