I feel that HK has the edge, especially in full sized pistols. In looking for a CCW, however, I did have to jump the fence to the Glock (G27) because it was slightly smaller and did offer the dual recoil springs, which I prefer, like the USP full.
One thing, however, I fully detail stripped the Glock for the first time the other night (using shoddy instructions off the 'net and a 3/36th" pin punch) - easy as making cereal, I was shocked because this was the first pistol I was able to do this with.
I still do not have the confidence to detail strip the USP, even though I have had it for much longer. If you really plan on giving it the beatdown, get the Glock because you won't feel as bad when you bang it up. Otherwise, HK all the way.