I got these goggles to replace my smith i/o.
And i'm gonna have to say that I really like these goggles a lot more.
This year Scott came out with the adjusting nose bridge so you could really customize to how your goggles fit YOU.
This really allows for less air and moisture to get into the goggles so they don't fog up.
In the past 2 seasons of using these I've never had them fog up on me. Where the i/o's fogged up at least once a week.