They just need to unleash it all here so that the fans will hype and whoever gonna wins this one, should not reach the official's decisions, in other words, it should be a TKO because there's no point in having a trilogy at this stage of their careers since they are at the peak of it and all they need to do is exert all effort to win their match since they are being overshadowed with the other boxers' popularity and they cannot seems to get a huge fights which everyone getting nowadays, I'm talking the middle eastern one where the payment is huge. All they need to do is get themselves off those contracts before they retire.
Jack Catterall though is the younger if I'm not mistaken, and is not yet a battle torn fighter as compare to Josh Taylor. Who have to go to a lot to unify all the belts and I do agree that it might have added a negative effect to him as he looks like experiencing a burn-out after accomplishing it.
Of course, every boxer wanted to score a knockout win against their opponents, that is the goal in every fight. But not every night it will present itself and so you need to have plan B and be as dominant as you can and maybe the knockout will come. If not then the judges will score and hopefully you did your best. This is huge fight in UK as they are domestic rivals and so maybe a trilogy is possible because of the money that they can made and before Josh Taylor retire.