Here’s some relevant images. I’m thinking a tracked vehicle will have far better floatation and traction in any case. I have yet to see an efficient tracked vehicle that *doesnt* rob large amounts of energy. On those lines, it may be better to use a fat bike wheel/tire. Studs are an option, and possible a paddle tire.
I’m thinking I will be split between good speed on hard pack snow and good floatation in soft snow. I don’t think I can achieve both.