Folks... there is no "one is better then the other"
It'll always be a personal preference thing which each of us has to decide/resolve for ourselves.
I submit the real question here all boils down to WHY as opposed to WHAT.
i.e. What is it you're after in your stage setup. Is it: Variance? Response Feel? Sonic Purity? etc.
In a much as I have respect to all those who prefer an actual cab, one of the reasons opting for a Kemper/FRFR setup has to do with some points illustrated in the following:
I don't share the above as a Bose commercial.
This video simply hits on some fundamental points akin to any FRFR setup.
So, fast forward/filter/ignore the commercial sales portions in the above video and focus on the points relative to stage setup comparisons. (Volume Wars, Linear projection)
Personally, I really favor having the ability to experiment with amp profiles using different cabs so I guess I hopelessly stuck leaving my Kemper CAB sim on.
Call me spoiled, but I suspect I'd get very bored, real fast with a single cab selection nowadays.
Granted, choosing an incorrect FRFR blend can result in unreasonable harshness, so awareness is necessary.
Still the overall benefits of FRFR IMO far outweigh the limitations of a standard set up.
I fully subscribe to the points Bose is illustrating and don't miss for a single second the stage clash experiences of old before FRFR.
Again... There's no right / no wrong. It's all preference. As it should be.