It's a bit weird, but yeah, there is. xD
Βόειο is meat from a 8-16 months old animal (usually 12-16)
Βοδινό is meat from a 16+ months old animal.
(Greek. It's all about the details.xD)
Edit: (Well. At least only some people believe there's a difference. You could be good with just βοδινό, as HellasCad said.xP)