For me, the Comp-Tac would be the better of the two, but only because their Customer Service is 100% top notch and they have fast shipping. You can't do wrong with either.
While I love my Milt Sparks, "most" leather IWB holsters don't hold up well and will close at the mouth when the firearm is not in it. This make's one handed reholstering all but impossible. Again, my Milt Sparks didn't have this problem but you pay a premium for Milt in money and time. I have tried several other leather IWB holsters that didn't work out at all, or worked for awhile and then went soft, so to speak.I just can't get it in my thick head that anything made of Kydex could be comfortable for IWB carry. That said I also admit I have NO experience with a Kydex IWB holster either due to...well, see sentence one.
The key is to make sure you purchase something that is reinforced at the mouth with either kydex or metal. The maker actually stitches it into the mouth band, covered with leather. With Milt Sparks they use metal. You can actually squeeze it in or pull it out to adjust tension, as needed. I would NEVER purchase another IWB holster that isn't reinforced in this manner. NEVER..... "most" leather IWB holsters don't hold up well and will close at the mouth when the firearm is not in it. This make's one handed reholstering all but impossible.
this is what i've found too. in fact, i tried an OWB polymer holster that kinda jabbed me in the side. i haven't tried the leather backed IWB kydex ones though. they look to be ok, but since it has leather, it kinda defeats one of the key features of kydex, which is light weight....I just can't get it in my thick head that anything made of Kydex could be comfortable for IWB carry. That said I also admit I have NO experience with a Kydex IWB holster either due to...well, see sentence one.