Baking 2 seperate dishes of chicken and not sure if I should put them on the same rack, or 2 seperate ones.?

They are going in the oven at the same temp. and are going to be removed at the same time. I wanted to know if they will cook better side by side in the over vertically, or if putting them on 2 seperate racks would be a better idea. I dont cook much and when I do, its not this much food. They are going in at 350 for over 2 hours. One is an entire chicken breast and the other is a pan of about 8 legs.

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