Woosta entering the thread in 3..... 2..... 1.....
0...
At this point in their careers, it's a more of a toss-up. Fedor is past his prime but is still so great that he's a top 3 HW. People can fuck off with the UFC HW title nonsense, Cain hasn't faced the level of competition Fedor has and doesn't have the experience.
Cain has the edge in age, and learning ability simply because he can study from Fedor. Cain's favorite HW is Fedor. Cain is mentally strong like Fedor. Cain has studied the way Fedor fights and has adopted somewhat of the same mindset in the cage.
If we were talking about anyone else, Cain would be the favorite but Fedor I would say still edges him out, simply because he's Fedor and whether you put him up against 100 bulls, 90000 ninjas, 900,000 abrahms tanks, nuclear bombs, USA/Japan/China, god, the universe he's STILL be the favorite. No one is Fedor. There is only *ONE* Fedor.
Cain's most advantageous area is wrestling, but Fedor has beaten every single wrestler he has faced. Fedor has beaten 7-8 former UFC HW champions. It's bullshit that people are going to mock Arlovski and Tim Sylvia but they *WERE* champions. Cain will be a former champion one day, Brock is a former champion. You cannot change the fact that they were UFC HW champions so fuck off with the can argument.
Fedor has the advantage in striking and speed, he's still the fastest HW in the world. His speed is deadly, insanely fast. Even faster in real life I heard. Fedor has the mental edge. Fedor has been semi-rocked by Fujita but Cain got fully rocked by Kongo and was able to rely on his wrestling.. they both have study chins.
Fedor has several wins by submission and his only legit loss is by a triangle, so he has probably drilled and practiced triangle submission thousands of times after that fight - his submission defense and offense are top notch.
Fedor has the edge in submissions and striking, Cain has the edge in wrestling but his striking is also good and he supposedly has good BJJ ( brown belt? ) so Fedor by a few hairs. Age can really be a factor though. If this was a prime Fedor we're talking about, Fedor would be a huge, huge favorite but Fedor would win 70/100 times IMO.