I’m going with Joshua by knockout. Henry wasn’t real aggressive nor did he display that much power. A decision for Henry isn’t out of the question but he wasn’t exactly usyk in the skills department
AJ by brutal KO. Henry Akinwande was very cauious fighter who protected his suspect chin. He had some skills but AJ just would run through him. The only way for Henry to avoid KO is to clinch desperately (like in the Lewis fight). Stylewise Akinwande ain't dangerous opponent for AJ. Too cautious, lack of inside fighting and not the best stamina.
Akinwande was not that easy to stop. But, his safety first style was often unwatchable. I will go with Joshua by close decision.