As for Shogun GnP, the difference I've noted and am commenting on is specifically his quick finishing abilty.
I have an immense level of respect for Tito Ortiz as a GnP beast. When I first saw Mark Coleman I thought he would reign undefeated for years. When I then saw Mark Kerr, I was at a loss to understand how such a specimen could ever be defeated.
That style of GnP still seems very different to the Shogun guard breaking KO power he seemed to have. For relevance, I today watched Pride 33 for the first time. I know of the GnP ability of others of the time amd others since. But Fedor, Randleman, Gomi, GSP, Cain, Randy etc have never made me go "holy shit" like Shogun just did.
Edit: and as for the Pele comments - what I'm really looking for is thoughts from those that may have been there. Totally aware that things were different then compared to now. I don't look at the record overall, but more the comments from those at the time, words from Quadros and others about Pele as a competitor and a coach(?), I want to know where that came from because I appreciate and respect that times were different and would prefer to accept the thoughts of those who know, rather than judging purely on numbers.