a comparison between kemper cab and the fr12 would be cool
I had a powered Kabinet for a bit, and for a longer period of time I had two Kones (version 1) loaded in my own 112 cabs, then tried a Neo Kone in one of them, all powered by a SD Powerstage 700. I don't have them any longer to do a video comparison, but I wouldn't be able to recreate an accurate representation of what I was hearing in the room as I do not have gear for recording any longer. If I did, it's still not the same as in person imo. I will give my thought's on the two, though it still comes down to personal preference/taste.
The Kabinet sounds decent, but in a side by side comparison I preferred the Kone loaded in my own 112 cab. I wanted something for FR mode that would translate well with the cab/IR within the rig itself, and the Kabinet and Kone never quite did that for me. I found they sounded better when implementing an Imprint, but that wasn't what I was looking for.
The FR12, as a personal monitor, checks all the boxes for me. It translates well from rig to rig, going from a brit style amp with a 4x12 cab, to an ac style amp with a 2x12 cab or a deluxe with a 112 cab. For me personally it gives a very good representation of each amp through the different cab/speaker configurations. And it is as close to being an "amp in the room' that I have experienced so far, and that has been a costly, time consuming endeavor.
Most of the digital units available to guitar players at this time are a welcome compromise, more amp and effect choices in a light weight box than anyone would ever want to lug around themselves, and the audience for the most part couldn't care less what your using as long as it sounds good to them. But as a player that has transitioned from amps, stomp boxes and way to much volume, the digital domain still isn't quite the same, but it's a change worth getting acclimated to.