kaido vs luffy

Luffy vs Kaido, length of fight.. One thing has been bugging me about the length of the fight. It feels as if Luffy vs Kaido was much shorter than Luffy vs Katakuri, latter being estimated between 9 to 12 hrs. Does anyone have an estimation of how long the fight was, Luffy vs Kaido, and does anyone else feel as if the fight was shorter than it ... live mu vs city