Quality differences between NAGRA PLP and PLL

there are none - at least no audible.

They sounded different to me with CD as a source--the PL-P sounded better. There are more tubes in the PL-P, plus PL-P uses battery power. Interestingly PL-P has higher distortion than PL-L per Nagra's literature. Anyway I liked the PL-P.

I would love to revive this thread since I'm currently considering both pre-amps (and have both available to purchase).  I personally like the idea that the PL-P has built in Phono preamp that apparently inspired the Nagra VPS, so it can't be bad.  But I'd love to hear owner / user impressions of the two pres.  I'll be pairing them with the Nagra VPA 845 tube amps as well as the McIntosh MC2600 (solid state) amp.