I had a 2017 Raptor followed by a 2018 Platinum, same engine. I then went to a 2019 Raptor and I was certain the 2018 Platinum felt quite a bit quicker. Absolutely no doubt it was due to the narrower tires and the overall weight.
BTW, is the cam phaser issue still extant in the late produced 2020?
Platinums never came with the 3.5 HO. Did you actually have a Limited which does? Just curious.