Not really equivalent now that you mention it. At the advanced age of 35, Tyson Fury beat the recent UFC heavyweight champion. For reference, most boxers are post prime at 35 if not washed up. De La Hoya, Roy Jones, Ali, Riddick Bowe, Mike Tyson, and Michael Moorer are all examples. Holyfield fought an old MMA guy who hadn't been relevant in over a decade. Even though it was an exhibition, he still managed to get himself stopped in under 2 minutes.
At the advanced age of 35, Evander Holyfield beat Mike Tyson twice and also defeated Michael Moorer. So what’s your point hahaha? Anthony Joshua turned 35 in 2024 and knocked out Francis Ngannou inside two rounds. All the fighters you mentioned, except Riddick Bowe, consistently fought top level opposition and have stronger resumes than Tyson Fury. Fury’s only truly “great” wins are against Wladimir Klitschko, who was already at the "advanced age" of 39, and Deontay Wilder, whose resume is the weakest of any long reigning heavyweight champion. Deontay Wilder makes Riddick "Cherry Picker" Bowe's resume look like Lennox Lewis's resume. Stop sucking Tyson Fury's micro, will ya?