They have a sick new lens out next year too. Its mirrored but it seems like it would be a low light lens. My friend has some phenoms with it i just looked through them for a second and it seemed like that.
The I/Os have the same size in field of vision as the Crowbar (if not more) but I find the fit is more general on the I/Os allowing them to fit many different faces well. They work with any Helmet I've seen flawlessly, especially Smith Helmets. I haven't tried the EG2s before so I can't comment there but I have 3 pairs of I/Os if that is any testament to my liking of them.