I don't have either, but would like to get a 1911 one day. I have no desire to own a Glock. Its ugly, made of plastic and I don't think that little trigger thingy is very safe. Did I mention it is ugly?
The 1911 design HAS been improved since its creation. They added a safety / decocker and DA first shot capability. That is the design most modern autoloaders are built with. Except Glock of course (which is really ugly).
I would much prefer a Sig (I confess, mine has plastic grips!) or a Ruger P series, etc. over a Glock (I would even take a Taurus first!). They are much better looking.
If you want a manhood extension, the bulkiness of the Glock makes it look much bigger, so I think it will work better in that department. Even though it is ugly.
Besides, Glocks are ugly, and that is enough reason for me not to get one.