Towing performance - F150 vs F250

BusterandBelle wrote:
I am shopping for a new truck. I pull a fifth wheel, around 10,000 pounds including contents.

I have a 2009 F150, and I find it marginal on long hills. I would not feel comfortable hauling through the Rockies, which is on our bucket list.

The new F150's have a higher towing capacity than my old one. But are they strong enough, or do I need to be looking at the F250?

Any comments would be helpful?