Lector CDP 7 Mk I, II or III ?

I plan to part with my second system Ayre gear to refinance a purchase for the main system and am considering to retain only the Yamamoto headphones with another good cdp. And so I came accross Lector, unknown on the local market and thus even more interesting.

Now, I did a search on Agon and found several people specifically advising the CDP 7 Mk I, clearly prefering it over the later versions.

Is the original Lector CDP 7 sonically better? Any specific reason for that?

Thanks in advance
Karel