I am not brand fanboy also. If you like sound of AXE FX II - go for it. Before buying I couldn't try nor Kemper neither AXE FX. But what I saw on youtube was that 90% of AXE FX samples are stuffed with distortion or/and effects.
That's because the clean to mid gain sounds in the Fractal devices are brittle and clearly lacking. When I tried the AXE II, I thought that the cleans in my POD HD were much better than those in the AXE. I think line 6 Helix will be a much better modeler than Fractal devices. Time will tell.