Toss Up
That is one that I doubt any of us will ever really know. They are both durable handguns and most any quality handgun will give a very long servie life. How long who knows, properly cared for and maintained they will more than likely be able to provide a lifetime of service and then be passed down in the family. From what I have read is that the military still has some very old 1911's that are still in good working order, though they may have had a few part replacements. The key just being maintiance and proper care for any of them.
I have toted a Beretta 92Fs for many years and have had it rained on while working patrol and have sweated on it carrying it concealed and have even dropped it a few times and it still runs without a hitch. What do I do. I shot it, clean it very well, and carry it some more. Then I do it all again.
The only thing I have noticied is that it does show a little bit of holster wear, but that just gives it character and shows it is a firearm that is used to possibly save a life, instead of one setting in some safe somewhere.
So who knows the answer to how long it will last, maybe I will have a grand child one day, that will know or maybe it will still be running strong then.
I sure hope so, because if we keep letting our rights be stripped away, they may only have what we leave them.