Less expensive but work great
I like using my Stance goggles in the backcountry. Less expensive and function great. I don't have to worry about as much about loosing them and they crush easily into my pack. Not something I want to do with the I/O goggle. I have the Green Sol X mirror lense and I like it for super sunny days as it is a very dark lense. Having the yellow is perfect for low light conditions and it gives a trippy color changing effect.