As you can see I'm also a proud owner of a CIJ 70's RI.
I never played an american standard, so I can't compare.
My experience is that this bass effortlessly keeps up with two distorted guitars in a rock band. That can not be said of my Marcus Miller sig.
However, the sound soloed is a bit boxy.
But I don't know if that is typical for P's (I never played another P).
Also a very large pre: a white P with black PG and rosewood neck works great on photoshoots!! Striking impact! Girls all over!! (...wakes up...)