How Do You Dine? User-Generated (Zagat) vs. Expert-Driven (Michelin)

Food is a sweetspot for word of mouth.  It appeals to our senses on so many levels and fulfills the five basic categories of industries that are driven by word of mouth (new-driven, story-driven, everyday-driven, complex/expensive-driven and taste-driven).

So who is more qualified to write about their recommendations for one of our favourite pursuits? The battleground heats up in cities around the U.S.

In one corner, is the esteemed Michelin Guide with a history stepped in french food culture, now taking on U.S. cities with a team of expert inspectors (they expect to sell 150,000 New York copies in 2007). The ratings for which have caused at least one restauranteur to commit suicide upon anticipating the loss of a "star".

In the other user-generated corner, the North American based and more democratic Zagat who produces 650,000 copies of the New York edition through the ratings from 34,000+ frequent diners to complete its guide of 2,069 city establishments.

Which is more credible? Which is more reliable?  Each have their benefits and their faults - which would you buy?