What am I missing out on by buying the smaller F-150 motor?

I just bought a 2010 F150, 4.6 3V V-8. My father-in-law has the 5.4 (or something).

Just curious, what can he do that I can’t. My truck hauls ass, if I punch it I’ll peel out >:)

At the end of the day, I don’t really care all that much b/c I love the truck, and mostly the only thing I’d be towing is my Sportster in the bed of the truck. So I’m really just curious…