I’m not saying it’s more potent I’m just saying he’s mastered again more advanced than Zoro has so far. So I think Kinemon has more advanced Haki not stronger Haki but who knows maybe the enma training will give Zoro the ability’s to cut kaido
What I also was expressing. More advanced means more powerful after all.
Kinemon only has experience on his side which doesn't necessarily imply more haki mastery.
Look at Luffy, took him a few minutes to completely reshape his level of haki from basic to advanced.
Only God knows how much time it would of took him had he not been trained advanced ryuo.