Tony's snark-fu was much stronger on "A Cook's Tour", but he's much more relaxed and enjoying what's there. It's more real, less staged, especially after the first season with it's weekly "Let's torture Tony" segment.
The show isn't all that different, but he's certainly having a lot more fun. Read the book of "A Cook's Tour" and you'll understand how nasty things got at times, and how little he got along with Food Network.
Yes, I miss the snark (it reared its head in the Azores), but some of the recent shows have been stellar, especially Bolivia. Make sure you subscribe to his blog at the Travel Channel -- you'll get the snark that doesn't make it on TV (search for Vic Chanko for the real vitriol -- it's his petulant alter ego).
What is patriotism, but the love of good things we ate in our childhood?
-- Lin Yutang