No, I've never used either one or even knew about them before this debate. Actually, I think I did hear about the .io here at HN a little while ago...

Uh no they are not. Are you blind? They're not even close.

Err, where do you see the same icons?

maybe one of the designers / programmers of twitvid.io is selling source code to twitvid.com on the side... :)