it seems it doesn't have so much output routing like our KPA (for example monitoring in stereo plus outputs for main PA)
The Helix has these outputs:
2 XLR outs
2 1/4" outs
4 1/4" FX send jacks that can also be used as outs
1 headphone out
1 SPDIF
1 USB
I send stereo (guitar and vocals) from my Helix both to FOH and to my CLR, no problem. IMHO the Kemper has nothing to worry about as far as pure amp tone, and it has a clearly superior harmonizer. But I find the Fuzz Face and Univibe in the Helix much more satisfying than the Kemper's. Each has pluses and minuses in terms of the UI. The routing and form factor differences are obvious.