I have switched from a compact car to a SUV that has about 16% bigger diameter for the tires. The tires are wider, too. So far, there has not been so much snow that I could make a final judgement of whether the bigger diameter tires are better in snow than the smaller diameter tires. I however believe that the increased tire diameter helps in snow: at least the bigger tire diameter enables greater ground clearance for the car.
However, in one answer to the question How much can New tires affect the speed on a car? it was claimed that tiny tires are great in snow.
So, which way is it? Are bigger tires (as in bigger diameter) better in snow? What if the car with bigger tires has for some strange reason ground clearance equal to the car with smaller tires?