The "blue" signal is recorded from the "MAIN OUTPUT" of the Kemper, because i was interested, how "colorful" is electronic circuit and AD-DA converters of the Kemper. That was target of my test.
But then that test is irrelevant! The KPA is specifically designed to colour the signal, by emulating tube amps. What goes on when that main purpose is bypassed doesn't matter one bit, as long as when it's engaged it sounds like a tube amp!
A much more relevant test (at least as far as the OP is concerned) would've been to test the direct out, to see if why his profile was so far away from the original amps sound had anything to do with the dry guitar signal and any effects of the KPAs internal electronics.
Cheers,
Sam