Daniel Dubois is 11 years younger when compared to Oleksandr Usyk. So I would naturally expect him to be more agile. Apart from that, in terms of height and reach, they are very similar. But if you look at their record, Dubois won almost 90% of his matches by KO. Usyk is unbeaten so far, but he has won by KO only around 60% of his matches. For Dubois, the first loss was against Joe Joyce (that too by KO), while the loss against Usyk was also by KO. Looking at the record, I would expect another win for Usyk.
We can speak of previous knockouts if only this is the first time they are fighting both fighters tasted each others power and have watched their flaws many times, if there is a changes that’s going to happen it should come from Dubois because he is the loser of the first match, he needs to do something differently as Usyk will do the same thing he does and will just made a slight adjustment.
We will see in the first three rounds whether the fight is a continuation of the first fight or a completely different match.