Well, I can't say that the PL XP-15 has made as much of a difference as the Krell amplifier, but it is pretty significant.
I just got it into the system this evening, I literally had to let it thaw for hours after it rode around in the UPS truck since early this morning, and I'm still playing with the loading a bit.... but two observations so far: it is MUCH quieter... much much much quieter. Really takes advantage of the Krell with black around each note. Second, it is much more detailed and realistic sounding than the Jolida. Piano notes ring more correctly, as do cymbals and drum strikes. Tomorrow it gets tested with voices lol I've heard things in a few of the albums I've played so far that I didn't know were there! Pretty cool. Looking forward to it settling in a bit more... but not having to move things around on the rack once I get it dialed in. It's also a beautifully made piece of equipment...
The other upside is that I moved the Jolida JD9 to the garage system. Huge improvement over the built in phono section in the receiver. Should have replaced / bypassed that a long time ago.