I have a lightweight S&W J frame, as well as a single-stack Walther PPS 9mm, and I actually find the little revolver easier to carry IWB. It's not about maximum gun width, but is more about how the gun is shaped, and I've noticed that my revolver can be carried deeper IWB than a comparable sized semi auto (ie-less gun showing above the belt line). I'm satisfied with it's capacity, and I can reload it fast enough. Although, at the range I do shoot the semi auto a little better than the revolver, for self defense purposes (and distances) I can shoot the revolver good enough.
I have several good carry guns, so I can take my pick, and it's almost always the little revolver. So if you're asking for opinions, I'd say stay with the LCR, but that's all a matter of personal preference, and if you think you'd like to carry a single stack compact 9, then it doesn't matter what anyone else thinks. Carry what ever makes you more comfortable.