Anyone know what the difference is between the Remora Series 8CH Holster (Pocket / IWB), J - FRAME REVOLVERS, LOWER PROFILE HOLSTER FOR CONCEALED HAMMER REVOLVERS 2 1/8” BARREL

and the Remora Series 8UC Holster (Pocket / IWB), J - FRAME REVOLVERS, ULTRA CARRY - LOWEST PROFILE HOLSTER FOR CONCEALED HAMMER REVOLVERS 2 1/8” BARREL?

I don't see pictures of the two. Thanks!