Overall balance is key, Stipe had more title defenses but Fedor had more top ten wins. Winning the UFC title doesn't have anywhere near the merit it use to be, they're constantly handing out unwarranted title shots, creating interim title and stripping title holders.
Fedor Beat Nog twice and CC who were clearly the number 2 & 3 ranked heavyweights for sometime. Stipes best wins are Werdum & DC. Stipes is 1-1 against DC who is probably his greatest rival and Werdum, who basically peaked when the average age had dramatically risen.