Out of the three tracks, if I had to choose one as my favourite, it would be the Kemper, Axe 2nd, HX 3rd. To me the Kemper is more round and full, particularly in the clean section, yet still cuts through the mix in the overdriven parts, more pleasing to my ear. The HX seems a little harsh and thin and is lost slightly in the mix compared to the others, the Axe somewhere inbetween.
Having said that, I' m also not sure what is being compared, as different amps/ cabs are used in each of the units, and are eq'd differently. The Axe track for example, is too nasal in the clean section to me, I would not be happy with this tone and would choose a different setup. There are countless examples of better tone than this using the Axe.
Thanks for posting anyway, enjoyed the examples.