Given that Primo Carnera was mob controlled, there will always be a great deal of speculation as to how many of his knockouts were actually legitimately earned.
Slightly over Bruno but only slightly. 3 of Bruno losses came against prime Tyson and still capable Tyson and then Lennox. Yes Bruno had 2 other losses but Joshua also gets stopped by Ruiz. Bruno did quite alot of damage to Lennox when they fought which I dont think Joshua could considering how he fares in his two fights against Usyk . Lennox might not move as well as Usyk but he's bigger puncher and could turn into a great inside fighter when needed. Lennox is way ahead of Joshua. Joshua vs Ruiz 1 was similar to Lewis vs Mercer . Consider it a lucky decision if you will but Lennox proof he could slug it out.