Lee you're about to start a pissing match!
Its very hard to say which is a better gun, its easier to find out which is a better gun for you.
I have two 1911's and three USPs. I agree with J_W.
Out of the box I would go with the USP, it is one of the most accurate guns on the market. They will feed anything (except wolf)
My Kimber dosent like 8 round mags, just 7 rounders.
If you spend the money for a custom 1911 it should feed everything also. A stock 1911 can be picky on the ammo it likes.
I have small hands the full size USP is a little big for my hands, the compact USP & the 1911 fit perfectly.
I need to twist the 1911 to hit the mag release, on the USP I can use the middle finger of my shooting hand to drop the mag, and I dont have to twist the gun to get to it.
Have you handled either one? See which fits you better.
I love my 1911s and my USPs.
For the money, I would also go with the USP.
I carry a USP45 compact almost all the time.