Have both, but rarely carry the Shield. Never found the compacts and even sub-compacts double stack pistols that much more difficult to carry. For me it is overall height that is my biggest consideration and I have landed on <= 4.5" overall height works best for me. Plus I don't mind shooting with a two finger grip and a little wider grip seems to fit my hand better.

I do use heavier belts when I carry and have a belt position and cant that seems to work well for me, be it a leather or kydex taco hoster. That probably contributes most to my positive experience in carrying double stacks. Finding that combination for fit did not come quickly to me though, so expect some experimentation to find what works for yourself.