Women's ski gloves aren't just smaller versions of men's—they're built around different hand proportions. Women typically have narrower palms and proportionally shorter fingers, so a women's medium will fit much better than a men's small, which might feel baggy across the palm while the fingers are still too long.
That better fit directly affects your time on the mountain. Gloves that are too loose let cold air in and make it harder to grip your poles or adjust your gear. A proper women's fit keeps insulation close to your skin for better warmth and gives you the dexterity you need for buckles, zippers, and phone screens.
If you're between sizes or have wider hands, unisex gloves can work fine—just know they're often based on men's proportions. But for most women, a gender-specific glove is worth seeking out for the comfort and performance difference alone.