It’s funny you bring this topic up, as I spent a considerable amount of time pondering this very question while hiking six miles on the snow-covered AT after work this evening.
When you’ve got more than a dusting of snow on the trail, I think it pays to have something on that can keep your feet dry. I LOVE hiking in New Balance shoes, but put them away when there’s snow on the ground in favor of a lighweight Vasque shoe that has a waterproof membrane and a bit stiffer sole. I find this works best for ME in the snow. Sealskinz are a good bet with with trail-runners; but, again, I personally prefer a bit stiffer sole for walking on snow.
As previously noted, you have to go with what works for you. If you have the chance, go for a walk with your trail-runners in the snow and see what you think. It will obviously be different walking on a snow-covered city street than on the AT, but you’ll still get a pretty good idea whether you want to “risk” starting your hike with trail-runners as your primary footwear. The only way to know what will work best for you is through trial.
Have a great hike, Slimfast!
Ozone