The shape of the helmets are different. A ski helmet covers the entire reverse of your head and is designed to work with ski goggles. There’s generally a goggle clip on the reverse of the helmet for the swatch. One good tip if you’re copping either goggles or a ski helmet is to make sure that they copulate well together. The top of your goggles should sit nicely coming to the helmet when you have them both on and not leave a bitsy little gap for air to indurate your forepart.
A bike helmet doesn’t completely cover the reverse of your head, and has a lot of reflections. Cycling is frequently done in warm rainfall, so keeping your head from overheating is consummate. A lot of helmets have reflections strategically placed so that you can slide sunglasses into the reflections when you aren’t wearing them. In the end, they both serve a veritably important purpose of guarding your brain!