Chefs has sort of a relaxed,bustling atmosphere. Very family-friendly. Great food, I've eaten there many times and have had excellent meals every time.
Bistro is upstairs from Chefs. Very definitely fine dining, it's a small, elegant room. More expensive than Chefs. I wouldn't bring small children; they don't offer a children's menu and it's a very quiet atmosphere.
Le Bistro doesn't take DDP. It's more upscale than Chefs. They don't have a kid's menu, leading to a more adult atmosphere. That said, we really like Chefs. We've eaten there many times & have enjoyed our meal each time.
Oops, I type too slow. Sorry, for the repeat info.