When still carrying a 1911 I used the Supertuck. I owned (still do) both cowhide and horsehide. The reason I got the horsehide is that it is supposed to wear more comfortably in the heat (doesn't stick to the skin with perspiration as much). Honestly, the difference (in TX heat) is not noteworthy.
Since moving to a Glock 36 I've abandoned my Crossbreed and moved to a Texas Tucker. It's not quite as large as the CB but every bit as comfortable (and for a good bit less money).