Rahman would be a way better win than Ortiz if you ask me - yes he had losses, but he wasn't afraid to get risky fights made. Far, far more proven than Ortiz.
I agree Rahman was more proven and has better wins (a better win than any current heavyweight imo) but I just feel like from what I’ve seen Ortiz is the more well rounded boxer and overall a better fighter than Rahman. It’s close though, Rahman is underrated by many and would be a top 10 guy today for sure.