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They are similar in size & weight (or at least close enough it won't make any difference carried IWB) The distinguishing features are the triggers. The Kahr has a long, smooth trigger pull resembling a revolver with a trigger job. The XDs is a striker type design. If you have any preference/experience with a Glock/XD type pistol then you're likely going to prefer the XDs. If you come from a revolver background then you might prefer the long smooth pull on the Kahr. The only other item that might influence your decision is the Springfield's ability to change the backstrap allowing some adjustment for larger hands. I've shot and carried both, and I stayed with the Kahr simply because I already possessed the extra mags and holsters for carry. YMMV