OK. I am driving a Tacoma and my thoughts are

I didn't get the TSB because she likes the ride. I'm taking her to the airport Sat and asked what she wants to take, she said the truck.

 

I'm not going to repeat what others said (they're right about apples to oranges, though) but the Sport has a more street oriented suspension. Perhaps the TRD OR would be more to your liking. It wouldn't be a complete 180 in regard to ride quality but I would compare the two if I were in your position.

 

If you don't like how the Tacoma rides comparing with the F150 is bacause the Tacoma is a mid size truck and the F150 is a full size truck...
Probably you're better buying a 2008-09 Toyota Tundra if Full size truck are you looking for... My Cousin has one since they came out and haven't got any troble at all and is a pretty awsome ride and power....... TOYOTA= Reliability.

My 2 cents.....

 

Buy a Lexus if you want smoothness, not a truck.
The reason the F150 is mooshy (not smooth) it's because it's made of plastic and silly putty.

 

I drove a 2004 F-150 Crew Cab, Lariat, 5.4 4x4 lifted on 35" tires to 71,000 miles.
I only had 2 problems:
I had to get the computer reflashed at 44k miles (a problem with 04's) It Cost me just over $100 and it was probably my Edge programmer that caused the problem.
It needed a new driver's side window regulator at 65k miles.

 

I have an '09 DC SB TRD 4x4 w/ TSB Springs done...

I replaced the BFG rugged trails at 1000 miles with some Big O Bigfoot AT's filled w/ nitrogen, and it was a Huge difference in ride quality that I noticed right after leaving the tire shop...