Rode one on a 2018 450RX a few days last year ... on an ARO 137. Awesome looking bike on the snow for whatever that's worth.
Was a fun package...ran well, started well. Power was good although a little peaky....being a sled guy I never know what to say about power on a snowbike....they're all wimpy but they all work.
We sell both, but have more experience on KTM's for winter use. Found the Honda more high maintenance on snow. Oil went bad quicker (thermobob and engine jacket helped, but did not solve oil in fuel), valves went out of adjustment quicker. If I owned one, I wouldn't hesitate to snow bike it, but would go orange if starting from scratch for snow use.