A mountaineering helmet is worth considering if you're spending serious time skinning uphill. These helmets are built to be noticeably lighter and more breathable than standard half-shell resort helmets, which makes a real difference when you're working hard on steep ascents. Most also feature headlamp clips for early-morning starts or late-day exits.
The tradeoff is warmth and coverage. Mountaineering helmets have minimal insulation by design — they're meant to keep you from overheating during uphill travel, not keep you cozy on a windy chairlift. On cold resort days, you'll feel the chill more than you would with a standard alpine helmet.
If you're splitting time between backcountry tours and resort laps, a well-vented half-shell might be the more versatile choice. But if touring is your main focus, the weight savings and breathability of a mountaineering helmet are hard to beat.