It's a shame combined records are irrelevant since the better fighters do not always have the better records. They mean even less when you don't consider their records at the time of their fight, which I'm sure is the case here. Anyway, here's how flawed record numbers are to define quality:
Brett Roger's record at the time he fought Fedor > Crocop's
Ryan Bader's record at the time he fought Jones > Machida's
etc.
See how flawed it is? Title defenses are an even worse indicator since in Pride the belt wasn't on the line eveytime the champion fought.
Now let's move on to the actual relevant numbers:
Fedor's win streak > Jones'
Fedor's top wins > Jones'
Fedor's time unbeaten > Jones'
Rounds won in a row: Fedor > Jones'
Finishes: Fedor > Jones
Finishes in the 1st round: Fedor > Jones
Jones does have the edge in some cases:
Damage taken during their prime: Jones > Fedor
Number of failed drug tests: Jones > Fedor
Hiding under a cage: Jones > Fedor
Having suspect T levels: Jones > Fedor
Cheating inside the ring: Jones > Fedor
Plus most of Jones' opponents were past prime or mid/low tier fighters:
Bonnar: Low tier
Machida: 1-3 in his last 4. Earned his shot by retiring old Couture. Past prime.
Shogun: Coming off a second knee reconstruction and layoff. Past prime.
Bader: Mid tier
Vera: Low tier
Rampage: Past prime
Evans: Good win
Matyushenko: Low tier
Hamil: Low tier. Lost by DQ
Belfort: Mid tier LHW at best. Lost 4/5 fights at LHW in Pride/UFC before Jones.
Teixeira: Decent win. Only had top wins over mid tier Ryan Bader and a past prime Rampage.
Gustafsson: Got his ass kicked. Close and controversial decision
Cormier: Good win
St. Preux: Ovince had 0 top wins. Lackluster performance by Jones, again against a guy he didn't dwarf.
Beating Nog x2 and Crocop alone > Anything Jones has ever done and will do competitio wise.
So yeah Fedor > Jones. Fact.