Everyone's right so far, http://www.smithoptics.com/products/#/Goggles/Snow+Goggles/Snow+Goggles+Evolve/
look at the difference in size, the I/Os were manufactured due to the complaint that the original I/O was too big for a lot of faces. If you read the description it says "The fluid lines and revolutionary outrigger locking mechanism of the I/OS key off the successes of the I/O to bring rimless interchangeability to an even broader audience." So there's something new with the outrigger maybe?"
Oh yeah and go read the description for the original I/O "Uncompromising in its design, the Phenom packs superior technology and maximum customization into our best fitting goggle ever." Well, that's not the phenom at all, Smith
--Monarch Mountain, CO--
"this one time we thought i had mono, but its fine, it was just diabetes"-FBGM
"God that helmet is a dank ass mushroom."-gREED