The second was worn by Rob Pardo, the Executive VP of Game Design at Blizzard. It featured an image of a rainbow above the words "Diablo 3." It also had unicorns and flowers on it. Very Barbie like.
While both shirts have their place, I think it'd be fun to know – which one would you rather have? Personally, I want the D3 shirt Pardo had on. Hilarious stuff there. But Ghostcrawler has gained quite a following as well. Vote for your favorite gear and be heard!