Well, between a sub 4" 1911 and a G36, I'd probably go for the Glock... I know opinions and experiences are varied, but I've seen too many 3" to 3.5" 1911s not work consistantly while G36s pretty much go bang every time.
Now, if we include 4" and 4.25" 1911s, I'd lean towards one of them over the Glock.