One is an actual spring w/ R&D behind it that is slightly stiffer & raises front end w/o compressing shock, the other is an adjustable snap collar that is essentially a zero R&D cnc’d Piece of AL that while may not significantly alter the angles of your A-arms ruining ball joints/bearings/bushings over time, but I don’t see how they wouldn’t compromise overall shock travel, cause the truck to ride rougher, OR in the very least be an automatic “warranty voider” should you have a front suspension component issue.
Plus they’re expensive for what they are. Not as chintzy as a block style leveling kit like “rough country” which is just redneck trash, but not worth the $$$ It’s kinda like deciding between bilstein 5100 adjustable shocks vs. a block kit for leveling the suspension on a “regular” 1/2 ton.
Personally going w/ geyser springs & +3 deavers lift a couple inches & leave an inch of rake plus some room for squatting under load w/o riding nose high.