If you're looking at them as two players only, sure. If you have to take into consideration spending vs. cheap labor not so much, but in terms of actual talent Gio>Burley by a long shot.
Gio has the "stuff" that the experts claim you need to win in the post season. Getting there remains elusive at this point.
*I know Buehrle pitched well in the 2005 post season, but that was long ago. He didn't awe anybody in 2008.