Quality differences between NAGRA PLP and PLL

I want to ask please if you have any experience with comparing the 2 preamplifiers above, are they in the same level when the source is only cd playr.
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.