The contract you shared is not a Manifold Creator contract.
They don’t seem to be adding the full image on chain but more of a configuration so that is why it’s so much cheaper. Probably the contract itself has the metadata already stored via another function or just hardcoded in it, but I can’t check the code since it’s not a verified contract. That would have made deploying the contract / setting up the metadata more expensive so that’s where the big part of the cost would have been.
