Can't figure out if you should dig into that hot steamer or chow down on the grill when presented with multiple banquets? Here's a quick fact sheet, always eat the banquet that corresponds with your primary stat if it's present, it adds an additional 25 to that stat.
Agility - Banquet of the Wok, +275 Agi
Intelligence - Banquet of the Pot, +275 Int
Spirit - Banquet of the Steamer, +275 Spi
Stamina - Banquet of the Oven, +415 Stamina,
Strength - Banquet of the Grill, +275 Str
No bonus - Banquet of the Brew, +250
All bonus - Pandaren Banquet, +275 Primary stat, +415 Stamina
Note that if you're a caster and you stuff your face with a steamer, you will be getting 275 spirit instead of intellect even if you don't heal.