Rate Jon Jones' Strength of Opposition vs. Anderson Silva's
I only selected their first title win and subsequent title defenses, and in the cases of rematches I picked the first fight.
Anderson Silva
Franklin, 32, 21-1 (1) Record (also fought at Light Heavyweight)
Nate Marquardt, 27, 25-6-2 Record (also fought at Welterweight)
Henderson, 37, 22-6 Record (also fought Heavyweight, Light Heavyweight)
Cote, 28, 13-4 Record (also fought Welterweight)
Leites, 27, 14-1 Record
Maia, 32, 12-1 Record (also fought Welterweight)
Sonnen, 33, 26-10-1 Record (also fought Light Heavyweight)
Belfort, 33, 19-8 Record (also fought Heavyweight, Light Heavyweight)
Okami, 30, 26-5 Record (also fought Light Heavyweight, Welterweight)
31 avg age
178-42-3 (1) = 79.5% win rate
44.4% of fighters competed in a smaller weight class.
Jon Jones
Rua, 29, 19-4 Record
Jackson, 33, 32-8 Record
Machida, 33, 17-2 Record (also fought Middleweight)
Evans, 32, 17-1-1 Record (also fought Middleweight)
Belfort, 35, 21-9 Record (also fought Heavyweight, Middleweight)
Sonnen, 36, 28-12-1 Record (also fought Middleweight)
Gustafsson, 26, 15-1 Record
Teixeira, 34, 22-2 Record
Cormier, 35, 15-0 Record (also fought Heavyweight)
32.6 avg age
186-39-2 = 81.9% win rate
44.4% of fighters competed in a smaller weight class.
TLDR:
-On average, Silva's opponents were 1.6 years younger than Jones' opponents.
-Jones' opponents had a 2.4% higher win rate than Silva's opponents.
-44.4% of both Silva and Jones' opponents competed in a smaller weight class.
I voted both of them as having "Fair" opposition.