A 1-1/16" piston has about 13% greater surface area than a 1" piston, so your pedal firmness/height will increase by that much, as well as how much effort you have to use press the pedal to stop the truck. It will definitely be noticeable, so if that's what you're after then you'll probably be satisfied with the change.

'97 4Runner, '06 F350, '86 4Runner, '05 WR450