I think Kabayel beats both of them, Wardley is limited in skill and I think Kabayel should outclass Wardley, Itauma is still unproven and hasn't been dragged into deep water so I doubt he would have a good time against Kabayel at this point.
Kabayel makes kebab out of both of them. Mind you, give them a fews years, they both might be capable of beating him. But not today.
I think Kabayel is the 2nd best heavyweight in the world but stylistically Itauma is all wrong for him
Because Tommy Morrison had a lot of hype whilst he was undefeated, mainly due to the way he fought - but his chin or stamina hadn't been tested until he got exposed by Ray Mercer.