Dave-
I've used both a regular Garden Tractor and a "Super" to throw/blow snow on different occasions, and I can tell you that the 12" wide tires of the bigger tractors do nothing to help you with traction in snow. Also, these tractors are bigger, but with the frame being longer and the transmission case aluminum instead of Cast Iron, the weight distribution is VERY different (i.e. mostly up front) which doesn't help traction at all.
Case in point, I had a cast iron and aluminium transmission sitting side by side on the floor about a year and a half ago. I was able to pick up the aluminum transmission to "waist" height with one arm. It wasn't easy, but it could be done. To lift the Cast Iron transmission right next to it to that height required two arms and a lot of grunting. I meant to weigh them to see what the actually weight difference was, but I never got around to it before installing one of them in a tractor.
Combine all of this with the fact that the 2 Stage snow
blowers are larger and more heavy than their single-stage counterparts, and you've got a huge lack of weight on the back of a "Super" Cub Cadet.
My driveway is 110yrds long at a fairly steep grade. From experience, I
HAVE to run AT LEAST 100lbs of weight per (rear) tire along with chains or I'm getting nowhere.
I know this isn't an actual weight-plan, which is what you were looking for, but hopefully these thoughts help.