Not just asking who would beat whom, but also how would the fight go and which version would you select to beat the other? '67 Ali, '74 vs 2024 Usyk or 2019 Usyk etc.
I predict a great fight between two great fighters. Ali is one of the few faster than a prime Usyk, but Ali had enough trouble with Mildenberger, never mind the greatest and most technical or all southpaw heavies. Great, great fight!