Ok I'm a semi-auto guy! That being said I have a jframe for pocket carry. Not sure what your looking for but generally for the same weight as a revolver you get double the round count, and easier reloads in a semi auto platform.
Now I've seen video of revolver guys that are just as fast as the Semi guys are, but that's a lot of practice. In general I'd say that for most people a semi auto will be easier to shoot and faster to reload!
That being said carry what your most comfortable with.