As Orion said, since we don't know what you're shooting now, it's hard to know what differences you might notice.
In general, however, comparing two otherwise equal bows, the 58” bow might not draw quite as smoothly as the 60” bow, and because of the increased finger pinch, might not have quite as clean a release. That said, a 28” draw is within the design characteristics of a 58” bow, so the differences I noted should be minor.
The 58” bow will give you an inch more clearance in a ground blind, or with tree limbs, etc. in a tree stand. It should be slightly faster than the 60” bow.