This is definitely one of the great things about the Kemper. Especially if you load up a load of profiles in RM and scroll through them without looking to see which is which (preferably with the cab locked). Can learn a lot about what you like/dislike.
To the point about mics & cabs making a big difference, this is one of the reasons I wish more commercial profile vendors would include more Direct profiles (although my preference is probably based on mainly playing live with a powerrack and guitar cab). Was glad to see ReampZone include DI profiles with all the knobs at 12 o'clock. While the Kemper EQ may not replicate that of the original amp its a good starting point for tweaking.