I love high end modelers.I just don't like expensive gear on the floor.
Or to put it in another way..I have a kemper rack and a kemper head..but never ever I would buy the kemper stage..
As I said ..I would buy a small floor solution like the fm3 or the quad cortex if the price would be in the 700-900€ range..but only with the quality of sounds like the kemper profiler.
And no..from what I have played in the RE with axe3/helix profiles they are not close.Not for me.
The thing is, the FM3 costs €1,200. Also it is something like half the processing power of its larger format.