Josh Taylor admits he could never replace the legendary Ken Buchanan

Josh Taylor faces Jose Ramirez for the undisputed world light-welterweight title and says he will never eclipse Ken Buchanan's feats.
“I’m not interested in replacing anybody,” he said. “What Ken did when there was only really one world champion and he had all his fights over in America, they don’t make them like that anymore.
Is Taylor right about Buchanan, Ken fought Duran at 135, Roberto fought a couple of figts at 140, would that version of Duran have dealt with Taylor at 140 easier than he dealt with Buchanan at 135?
https://www.mirror.co.uk/sport/boxing/josh-taylor-admits-could-never-24156531