Sometimes, mere 1/10th of an inch can make something perceptively more comfortable, whether its a bit smaller to ease concealment, or a bit larger to make it more comfortable to grip when shooting. With carry rigs, a slight change in angle or position can make an enormous different in concealment or comfort. We are also built differently, which causes different weapons to jab us in different places. The FBI tilt causes most grips to jab me in the ribs, so I tend to like straight-draw, or nearly so, yet with straight-draw, pistols such as Glocks and the HK P7, with large squared-off protrusions at the rear of the slide, will jab me in the ribs with their slides. I would rather carry a full-sized 1911 in a vertical scabbard, than a Baby Glock in just about any strong-side-hip rig! I generally like to carry full-sized weapons as much as possible, and have in the past concealed my 4" S&W M58 .41 mag duty revolver IWB, because it was either that or my J-frame snubby. (I was a broke rookie cop back then.) Longer weapons are sometimes more stable than shorter ones; I found the 4" N-frame more stable than a later-purchased 3" N-frame, and when worn IWB, the 3" poked me in a certain spot, whereas the longer weapon bridged over that spot, causing no discomfort. I noticed the same thing with 1911 pistols; a Government-sized 1911 is comfortable IWB, whereas a Officer's ACP-sized 1911 jabs me with its muzzle. I no longer own the 3" N-frame nor the Officer's ACP. I seem to have rambled a bit, but just wanted to share some experience, as I have carried concealed for nearly a quarter-century, and experimented quite a bit with small, compact, and full-sized handguns. FWIW, I am of thin build, and carry in a hot climate.