I think the discussion is missing one point guys. Most of the sound coming from a guitar and amp comes from the player. As I mentioned in my first post on this thread, if you have different amps responding differently to you, you will play differently.
The playing in this DI comes from the way Alan played with his own amp providing the sound feedback to his ears.
There are stark differences in all clean sounds of the Kemper, but some of the amps need to be pushed by the player more or less (just like in real life). Perhaps with a unit in hand, Alan would feel and hear the difference between all of the profiles that Martin kindly re-amped.
I would definitely buy the Kemper purely based on its replication of clean sounds ... my livelihood depends on it!