Actually, after onishgama , sanjis CoO can still be stronger than Luffy.
Because , When sanji going to BM , Luffy does not perceive and he asked jimbei where is sanji. May be oda want to show how much powerful CoO sanji has with that way.
Because , When sanji going to BM , Luffy does not perceive and he asked jimbei where is sanji. May be oda want to show how much powerful CoO sanji has with that way.