Jadis DPL2 vs. Jadis JP15

Has anyone been able to compare the Jadis DPL2 pre with the JP15? Judging by the specs, they seem very similar apart from input impedance (42kΏ vs. "more than" 100kΏ). Are there noticeable sonic differences? Any cabling peculiarities on account of the different input impedance?
Thanks for your advice.
Hi Karefiled

Just wondered if you ever received an answer to this post. I have the same issue.