For a period of years, like earlier 2000's, PRIDE had a deeper pool of talent. A very world class of fighters, usually in the heavier ranges. While this doesn't necessarily mean PRIDE was better, it was easy to give credit to an organization which had more high caliber fighters at the time.
It's like comparing USA basketball to World Basketball.
There are plenty of great Americans, and it's very competitive in school ages, (as well as 300 million people)...for every one great basketballer from Europe or Asia, there would be 3 or so in America (statistically).
But, this isn't true...many nations outside the USA are great at basketball - period. Which was the case as PRIDE was with the high population of fighters > UFC.
To clear names up though...
-Has fought 3 times as much fights in PRIDE than in UFC (therefore must be a 'Pride' fighter)
-never fought Forrest Griffin.
-has beaten Wanderlei Silva.
-Has fought over 3 times more fights in PRIDE...only 3 fights in UFC (means Rampage IS a Pride fighter based on your comparisons).
-Is the LHW UFC Champ.
-TKO'ed Liddell once while fighting for PRIDE (UFC's ex-poster boy)
-KO'ed TWICE by Wanderlei Silva.
-Has fought 5 fights in Pride BEFORE fighting 6 in UFC.
-Lost twice by submission in Pride.
-Is the MW UFC champ.
-Pride Legend, second to Fedor in HW.
-UFC HW Champ.
-Lost only to Fedor and Dan Henderson (earlier in his career).
UFC is king now. But, the fighters you point out were once considered PRIDE fighters. Except for Forrest and Chuck....and Anderson to an extent (he lost so never had the chance to go for a belt).