To me, firing a Glock and a 1911 side by side, the 1911 points naturally, is well balanced in the hand, and feels all around like a firearm. After firing the 1911, picking up a Glock feels like somebody just handed me a 2x4 with a weird feeling bump on it.
Which 1911? The one with the flat MSH and long trigger, or the GI A1 version, with the arched MSH and short trigger? The later and the Glocks really arent all that different.
As far as thickness, all the grips on my 9mm high cap Glocks, have a measured thickness side to side that is "thinner" than my 1911's measured at the same point.
As far as grip angles in general, once you have shot any of them for a little bit, your brain registers whats needed for them to index them properly when held. It usually doesnt take but a mag or two for your brain to "readjust" its indexing, and youre pointing naturally again, with whatever it is in your hand at the moment. Unless of course, you choose to fight it.
Over the years, Ive used 1911's longer than anything else. Spent a lot of time with SIG's, HK's, Walthers, Glocks, and a number of others, revolvers too, and have no troubles switching back and forth at will with them, but I do shoot them or something similar on a fairly regular basis.