Often hear that narrower tires with smaller rims(thus with higher side walls) are better at snowy and icy conditions.
How’s your real world experience for the matter?
I,ve tested winter tires and 4 seasons in the same day and condition but never had a chance to compare between two sizes with the same compound in the same condition.
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The height of the sidewall won’t matter quite as much as other factors when considering traction on any surface.
In this informal experiment, it was determined that a narrower tire really does have a better contact patch than a wider tire. Deflating your tire a bit also improves traction.
At the end of the day, no amount of tire adjustments, tire technology, or combination of width/height/pressure will overcome poor driving habits. Accelerate slowly. Brake early. Go slower ALL the time in poor conditions. Leave MUCH more room between you and the car in front of you. Be careful when turning AND accelerating. Etc.