Hi Bruno,
if generally a comparison is possible, the Midifile in the Key mayn't be worked on, because then become apparent the specific DSP.
A Midifile contains no tones! Only tax orders! The sound delivers the Key.
I think that is still audible that the KN 7000 has no serious sound disadvantages to the new Keys.
If I work on "Sway" in the KN 7000, it sounds better!