Answer me this honestly. The fighters that Tua fought against Ruiz Maskaev Ibeabuchi Lennox Lewis David Izon Hasim Rahman (first fight) Now Tua vs Ruiz comp Evander Holyfield first fight Kirk Johnson Tony Tucker Andrew Golota Again top 5 means nothing in many cases with King related fighters.
Too many variables to consider. Ruiz wouldn't have become the fighter he was if he wasn't knocked out by Tua and developed much more slowly in the following years from a brawler to a spoiler. Tua stayed the same fighter, always outboxed and relying on raw power to bail him out of holes, though his conditioning became less consistent. I would certainly favor Ruiz the finished project against Rahman, Oleg, and Izon. Ike is always a wild card, maybe Ruiz draws a DQ. Ruiz probably loss to Lewis but makes it interesting...in a boring way. I think Tua at his best certainly beats Golota and Tucker. Old Holyfield could very well upset him, he isn't a washed up Moorer. Kirk Johnson is a toss up, not sure