I had heard the metallurgy of the P-01 was somewhat improved over past work, same as the Sp-01.
I do have a P-01. Great gun (DA pull is a bit rough but still serviceable). To be honest unless I think the alloy is heavy and durable enough, at least IMO.
Guns don't kill people. Apes with guns kill people! - Robin Williams
Number of handguns currently owned and previously owned: 45.