The Spanish league is less intensive and those teams can manage their squads easier with resting players etc. In the premier league you have to play your best or else you will just lose. In als Liga you could play squad players and still win especially if you’re the top two. So you get a good team that’s better rested playing a good team that plays intense games twice a week. We always see teams being weaker after a champions league game, you can’t even rest your players in the prem because you will risk losing. You don’t have that in La Liga. They still play good football but edge it out having an easier league.
Do you have a link to the Ronaldo one by any chance?