I have owned two standard S&W Shields in 9mm. I really hated the triggers. So rather than pay to get better trigger I just traded one and sold the other. I tried out the P/C model at LGS and I was sold. As far as the porting goes I can't really tell the difference. I own 4 other handguns that at ported, one is magna-ported. A S&W model 629 Trail Boss. Highly polished stainless with 2 1/2 in barrel.