I have and carry both. Things to keep in mind with a semi-auto pistol is that you have to take them through a break-in period to make sure they are functioning dependably. You have to make sure that they will work with your intended carry ammunition. Some 1911's have trouble digesting hollow point ammo and certain brands of ammo (Wolf being one of the more problematic). After getting all that out the way, you need to still practice on how to handle a possible jam caused by improper grip (limp wristing the gun), feed problems with a magazine, etc.
Revolvers are a lot less finicky than an auto-pistol, but some strange things can still go wrong once in a while. I have seen or heard of the following, but nowhere near as often as jams with auto-pistols - Anyone here ever have the ejector rod start to come loose? If it backs out, it can jam the cylinder to the point that you can't open it to eject spent rounds. (Happened to me one time at the range with a S&W Model 66.) Some of the light weight scandium frame revolvers have had problems when shooting magnum loads of having the unfired bullets unseat, move forward, and jam the cylinder.
You just have to make sure how to operate what you choose to carry and make sure it works reliably.