Men's ski gloves are built around male hand proportions—wider palms and longer fingers—so they fit more naturally than unisex options, which tend to be based on men's sizing but try to split the difference. When your gloves actually match your hand shape, you get better dexterity for gripping poles, adjusting bindings, or working zippers without having to take them off.
A proper fit also keeps your hands warmer. Gloves that are too loose in the palm or too short in the fingers leave gaps where cold air sneaks in and warm air escapes. Men's-specific designs eliminate that sloppy fit, so your body heat stays trapped where it counts.
If you're a guy with average-to-large hands, men's gloves are the way to go. Unisex can work in a pinch, but you'll likely notice the difference in comfort and control after a full day on the mountain.