I know I personally will give up a little comfort on the daily miles to avoid those butt pucker moments towing on the worst roads I'll drive all year. The F-150 seat won't be as comfortable anymore after there's a hole in it from clenching! Ask your dealer if warranty covers that! haha
Ford has the base curb weight listed for a 2018 F-250, Lariat, 4wd, 6.7 diesel, 6.5' box as 7264#. A 2018 F-150 in the same configuration with the 3.0 diesel is 5320#. All that extra heft you're pushing around eating up gas mileage daily driving the F-250 finally becomes helpful in the winter months. Friction Force (F) = Friction Coefficient (U) X Normal Force (N). This is a very basic equation and determining the friction coefficient between a tire and wintertime road surface gets pretty hairy with all the factors involved. Assuming that stays the same for both trucks, you're left with the normal force (weight of the truck on a flat surface) to govern the friction force between the tires and the road surface. If you want to look at the ratios of friction forces F-250:F-150 you end up with (U X 7264)/(U X 5320) = 1.365. So the F-250 is going to have 36.5% more traction just based on weight than the F-150.
If I was towing a 28' sled trailer in adverse conditions with the F-150 I'd invest in a dedicated set of winter studded tires for it. Maybe even for the trailer.
DING DING DING
You must have posted this just MOMENTS before I replied above.
You took the words right out of my mouth.
Its the ONE PERCENT of the time that SCARES the crap out of me.
Not the 99% of the time when I am cruising around in town.
As for the tires.
Ya, I am a FULL BELIEVER in WINTER and SUMMER tires.
I have NO problems with TWO sets of tires at all!
Never tried studded tires on the trailer though.
Its an interesting thought...