Ok - substitute the word 'switch' for 'comparison'. Forget I ever said 'comparison'. I would just like to be able to switch between the reference and the profile and have the other mute to make life easier. I'm not expecting the results to null.
I've unplugged and replugged my amps and muted my mixer channels about 100 times today. It's becoming a chore.
I get that you're proud of the KPA's ability to totally replicate a miked amp - it's really very, very good - but don't let that perfectionism get in the way of the user experience. Make the device fun and easy to use as well as sounding great.