A five-link, coil-spring rear suspension and available 37-inch tires give the 2021 Ford F-150 more capability, but the 35s are more fun.
www.motorauthority.com
This dude actually explains the difference in feel quite well in his review.
Yeah & this direct quote says all you need to know:
"Every course revealed the same thing: Raptors with 37-inch tires are more composed, stable, and comfortable, but feel slower and less engaging. The 35s make the Raptor more nimble, and it acts more like a rally truck with a rear end that wants to kick out when pushed through turns on sand or dirt."
Soooo, that being said, & knowing the bulk of the extra weight penalty is in the rims not the tires AND knowing we're talking about the same HO 3.5 EB that gets hyper motivated w/ a simple tune - I'd totally stick w/ my preference & go w/ the 37"s
BY the time I wind up buying one I bet (and hope) you'd be able to order on a lower trimmed Raptor as a stand alone option