My buddy and I took his Rhino out north of Westloc on the last week of November . We were riding in 10 + inches of snow no problem. He is selling it if your interested send me a PM
I find the Rhino usually does best on the first pass in the deep snow. On the second pass, if the snow hasn't stiffened it sinks down deeper and starts to hang up more.
I've got agressive tires on mine and it will do fairly well out ice fishing in the deep snow. For example well equipped 4X4 trucks were getting stuck breaking new trail but the Rhino made trail more easily as it doesn't sink right down to ice or hang up as quick. I would say on flat ground it does slightly better than a truck to give a reference.
I don't have a quad but from what I have experienced when out with other quads it is as good and likely a bit better than a quad.
My thoughts. Bring out the sled. It's hard on the drivetrains fighting the snow for another week or so, and then you'll need a sled anyhow. Sleds are warmer, faster and smoother.