Volunteer,
I've shot both, and at 25ft or less, they both produced one ragged hole. In all honesty, I shot the standard USPF slightly better (hardly noticeable) because it had better sights (Just my opinion.) I am putting the money together right now to buy a USP, and I've decided on the USPF 45 SS, then I'll buy a threaded O-ring barrel from Larry at CCF. I'll end up spending more than a Tac, but I'll have it in Stainless and an extra barrel.
J. Wise