so me he could low diff jack... Nah its a mid high diff for sanji either way... i believe if he and jack face... sanji will triumph. and move on to help marco.. if he directly goes off to face king it would be linear writing and predictable... oda is progressing gradually with sanji since he is a versatile character that involves miscellaneous clashes with others.. .. and gradually as plot is unraveled he'll face more or his true enemy in Onigashima .... it may even be that the fight with jack would be an actual one v one.. but sanji proves to be too much for Jack.. and then when he confronts either king or queen... they'll be more serious around him unlike king was around sanji... just to show that.. sanji ain't you avg hillbilly.