I loved Tua. The guy came to fight but his opposition wasn't always willing to cooperate. I think Wilder's reach would make it near impossible for Tua to catch him. Tua was never that effective against guys with reach, who knew how to use it. He wasn't like Tyson who would simply bore his way up the middle to reach the head. You know what would have been an awesome fight, that I think Tua would have one, was Tua-Braxton/Qawi. That would have been a war for as long as it lasted.
That Tua was a beast, he had some Joe Frazier type head movement going on during that time frame, and was also in great shape weighing in the 220s. He'd have eventually caught Wilder with a hook, and it would have been night night.