To my knowledge, the only functional difference, naturally, is the length of the contract. If it’s an open run, the standard contract is 1 year, though it doesn’t have to be. Also, I don’t know for sure, I also wonder if the royalty structuring is different, given that a limited run doesn’t anticipate generating royalties for as long. Maybe some high-profile artists can negotiated higher initial fees to offset that - I don’t know.