I think I can hear a "slight" difference between the two..I recorded a short sample playing random chords using the two different FW tuners so you can hear it for yourself (may be)
1st part is 1.6.1 second is 1.7 ..I didn't change anything else
I know what's happening here...
The first clip is the KPA.
The second clip is the Axe2 with all frequencies above 11Khz uncut...