No, I like it, please don't put back the old one. And it's PZ IV ausf i.
Just a heads up, there is no such thing as a Panzer IV Ausf I. The old Panzer IV was likely meant to be a Model G dispute having several characteristics of the Model J due to being ported from CoH1's Model J. The new one is most likely a late Model G. If it were an early Model G it would retain the shorter barrel and older muzzlebreak of the replaced model, whereas a Model H would have schurzen as soon as it entered the battlefield, not at Vet 2.