But GSP and Floyd only have that record because they played it safe.
GSP retired at age 32.
Fedor kept fighting past 32 and lost at 33, 34 and 40.
Had GSP kept fighting he likely would have lost.
He also never fought anyone bigger other than Bisping. Fedor fought several dudes that were several inches taller and 50 pounds heavier and were far more dangerous and vicious than Bisping. He was almost always the smaller guy and did not lose for a whole 10 years while fighting many dangerous KO artists in the division where one punch can finish you. 10 years! GSP lost 2 or 3 times in the same time span before he retired.
Fedor also displayed more ways to win. Fedor would win by standing KO, GNP TKO, submission from top, submission from bottom, decision from outstriking, decision from outgrappling....Fedor could win anywhere the fight went.