Dear diary,
I found out that always when I tweak the settings of a rig after a while the level was significantly lower than that of the original rig. I searched all the possible gain stages (don't forget the volume setting at the end of the cabinet menue) and still the original rig was always louder. Louder and cleaner. Now it turned out the culprit was the volume pedal. I use a volume pedal in EXP2 set as global volume pedal after the effects. But in the rig menue there is a tic where you can choose "lock volume pedal" - which I did not. So in the original rig this value was set to "after stomps". Now with the volume pedal locked both volumes are equal. Maybe this can save some debugging time to other fellow Kemperers...
