It all depends on what you want out of your truck. If you plan to run a wide wheel/tire combo, then you need to be careful about the spindles on the deluxe kit pushing your front wheels out a bit. At the same time, the deluxe kit will give you a factory ride quality, and give you the option to go lower than 2/4 down the road.
The economy kit is cheaper, but will ride a little stiffer and you wont have that cushion to go lower down the road without replacing the front coils with spindles.
Both are great kits, but they each have their place.