The main difference will be the stepping version. When a new batch processors are launched, most of the time they come in a newer stepping revision. Same applies for a board as well.
Sometimes, the newer steppings may have some minor changes. Your main concern is to make sure whether all the steppings have been validated on the board and if the board allow you to use different steppings. This information should be available in the board Technical Product Specification if it is an intel server board.
All the best,