These are our two favorite World Showcase spots, but ... I'm gonna give a slight nod to Les Chefs. There is a much wider variety on the menu. On our last visit, I had the beef tenderloin (Filet de boeuf grille, if you prefer), and I'm gonna tell you it's a really competitive WDW steak. I've heard some great reviews of the beef short ribs, too.
I'm wrestling with which of the two will get our business in May. So far, I'm leaning toward Chefs.
BYW, if you're looking for a World Showcase TS lunch spot, Les Chefs has the best deal EVAH. For your amusement:
The French Menu
$19.95
Soupe a l' oignon gratinee - Onion soup topped with Gruyere cheese
Croque monsieur et sa salade verte - classic French toasted ham and cheese sandwich with a green salad
Creme brulee - vanilla creme brulee and a madeleine
It's yummy and filling, but not too filling.