Eric, he's saying that the same pickup in a different guitar sounds great through the same amp with same settings; he probably doesn't want to change the preamp tubes.
This is a radical suggestion, but maybe try upping your string gauge on the prs and using a lower output pickup like a black dog. The prs is a mahogany neck with a 25" scale, so it's inherently middier/darker than a guitar with 25.5+" scale (especially if you're BRJ has a maple neck, but even a mahogany neck). Upping the string gauge will give you more upper harmonics and bass response, and the lower output of the black dog will mesh nicely with that change. Considering you have an 808 and play through a higher gain amp, this should be more than enough to make up for lack of output compared with the PK.
I think the cold sweat would be a good choice too, but definitely up your string gauge if the PK isn't defined enough for you. At the very least, back the PK away from the strings more. Maybe it's just too close and getting muddy?