I hear a lot more people tell me they love the XDS than the Shield. I own a Kahr PM9 and I love it for comfortable Carry. BUT, I can't shoot it that fast and be accurate. I think it all depends on trigger control and whether YOU have it for these guns. I tend to stage the trigger to get accurate shots...That is why I like 1911 9mm with manual safety, or DA/SA.
Just buy all of them, try them out and sell off the ones you don't like.
Cody