personally, I've not used either on my truck.
Most over the road trucks and trailers are moving from springs to air ride for several reasons:
1 - Smoother ride - protects their cargo (will protect your ride) - but since these systems move a lot more to smooth the ride, shocks wear faster
2 - Increased payload - they do not sag under load - increased air = increased capacity
3 - Lighter weight - weighs less than steel leaves
The issues on a pickup
1 - no onboard air like a truck - need external source - trucks have automatic levelling valves that maintain a ride height regardless of load
2 - when you load the truck, you will need a way to inflate the air springs, and when empty, need to remove air to maintain smooth ride/correct ride height
The air ride is probably going to work better for you, as long as you have a way to adjust the air pressure according to your load