Oden was stronger otherwise why make the whole hostage thing? Also fo course the fight ws summarized, Oda didn't want to waste much time on it and more importantly show Kaido real powers/cards before the real fight started. Also it has to be underlined that thoae fight was Kaido and his army (calamities included) who ambushed Oden and his 9 scabbards so maybe, just maybe, there was also another disadvantage like 10 people fighting an army. Then of course Oden and Kaido had ti be close and Kaido got musch stronger in the last 20 years but imo it is clear Oden had the better portrayal in their fight