My 2004 with 4.10 gears, 48re auto gets 11-13 pulling my loaded 28ft enclosed trailer and car going 70ish. if I turn the programmer down some I have gotten closer to 14 at the same speeds on some trip.

I have gotten as much as 16 towing the same car on an open trailer at those speeds.

As far as what is better you need to spend some time on the truck boards. it is kind of like the 8 3/4 vs dana or small block vs BB threads. Everybody has opinions and just like with most things in life, what "you" have is the best option in your opinion. Me personally, I am keeping this early 04 305 555 5.9 as long as I can.

good luck