Hey RG, I had almost the same thing happen but with Seymour Duncan JB's!
I really liked how my JB's sounded in my Jackson so I thought I would put them in my cheap ass ESP to beef it up. After they were in they didn't sound anything like the p/u's in my Jackson at all. They were exactally as you described it mid-raunchy with a lot of bite, but in a good way.
Pinch harmonics have a richer "squeal" to them and seem to just fly off the neck with little effort.
Also cleans sound really good, clear well defined chords and arpeggios.
I think it's the guitar, wood is different, neck is different ect. The basic differences between a $400 guitar and a $1200 guitar.
It does a great Scholtz or Lynch tone with the extra mids, adds a different flavor compared to my other axes with JB's as well as my super distortions.
Looking forward to hearing your clips!