I ran 19.5s on my F350 for 8 1/2 years. They do ride a lot different than my stock 18s. I didn’t know at the time, but there are 18s now that approach the load rating of 19.5s at 4080 lbs for the 18s. That might be worth a consideration.
If you aren’t maxing out the pressure on the 19.5s, you could end up being equal with no ability to air down when the TC isn’t on the truck much past 70. You’ll pop the bead on a 19.5 if you air down. Also, the speed rating is much less on most 19.5s.
That being said, one of the reasons I bought a F450 was the 19.5s. I don’t usually drive it unless I have a load. The tires are tougher. But like I said the speed rating is less which might not be a problem if you never drive over 75.
Bridgestone and Continental have less agressive 19.5s that are still M+S. I’m not sure if they have snowflakes on any models or not. Typically, steer tires don’t have much traction, so I think you’ll be looking at all position tires like the Continental 920s.
Good luck.