In theory, the "A" should better, which is unusual that its also appears to be cheaper. The content shows me they are actively adjusting the Lys and Met levels higher, which is good, and they are making use of a number of ingredients - soy, fish meal, pork meal, even meat and bone meal - which...
x4. A or B.
When you start raising meat birds, they will almost certainly do better on A*. The cost difference between A and B, and the meat bird rate of growth on A or B, will determine which of the two is more cost effective for you as part of your management system.
Best way to tell would...