I don't have experience with the Kimber compact SS, but have a Colt LW Commander bobtailed and love it for concealment-no "printing." I can sit in the truck, ride my motorcycle, etc and not get stuck in the ribs. Going to get a full size Wilson done next...
I do have both a Kimber Compact and a bobtailed Kimber Pro. Of course, the top ends are identical. I love them both, and find the bobtail frame conceals just as easily as the compact, plus it provides a full grip and an extra round. The smaller frame of the compact is uncomfortable for some guys, but I've gotten used to it. Either way, you're good to go.
The corner of the bobtail is rounder than the corner of the OACP frame. Minute difference, but both literally conceal the same. The Ulta Carry, though, is about 10 onces lighter. Nicer for summer carry.
Here's a old photo of both types. Note the prominent corner at the mainspring housing pin on the Ultra compared to the smooth part of the bobtail. Really very little difference. Full frame will hold 8+1.