I can't get very excited about any reduction in size that simply shortens the barrel.
The advantage of buying a compact model is in a shortened grip length, or a reduction in the thickness, such as might be gained from going from double-stack to single-stack mags. Both of these things make a pistol easier to conceal. Shortening the barrel makes very little positive difference, while shortening the sighting radius.
I would definitely take notice of a single-stack .45 with a shortened grip...basically their own version of a Glock 36.