For my cleaner, plainer amp sounds, I have only ever found/tweaked a few clean patches I really liked on my AxeFx2, and nothing that every felt/sounded much like my favourites: my Dc30 or Ceriatone BM (John Mayer Type Dumble clone)
However, Straight away, on day one with the Kemper, from the free shared KPA patch database online, I have patches that are close enough to these 2 for me to enjoy. Certainly at present, simpler cleaner patches with a lot of amp feel that I would often use are more plentiful on this KPA
I was not initially too impressed with the factory-supplied cleaner or metal/rock sounds on the KPA, and the FX are a bit fiddly from the control panel (although that is compared to the dedicated main controls - volume and EQ - still easier than the AF2). Having the dedicated Bass/mid/treble/presence is such a pleasant change, along with the input gain and volume controls
As I said, the sounds I was looking for were available on day 1 with the KPA (not from the KPA-stock rigs though). The Thomann USB stick had a lot of very good sounds, the free Lasse Lammert Signature Rig Pack is exceptionally good for rock and metal, and the KPA forum has quite a few good ones. I went to specialist profiling suppliers for more ones, you can find a few online
KPA is not as heavy or solid as the AF2. Who cares though, it lives in a rack
KPA has no fan - what a relief, the AxeFx2 fan is very noisy
KPA does not try to blow your speakers when you power off if you forget to mute it first - the AF2 does create a big pop
The AxeFx2 FX are way better (delays and reverbs, pitch, etc), the PC.Mac based AF2 editor is better than using the front panel, making routing etc easy on the AF2, in comparison, the KPA is very simple and inflexible
The KPA deals with different guitars & pickups better (using the clean sense control, and the always-enabled input gain knob etc)
Overall I feel much more like I am playing and hearing a guitar amp with the Kemper, it is perfect for recording. For more ambient and effect-driven sounds, the AxeFx2 would be better