69 Camaro Mini Tub - Leaf or 4 Link Coil over?

[srode]

In the planning stages of putting mini tubs in my 1969 Camaro, and have read comments about the spring rate needed on leaf springs for 2 or 3 inch lowered set up makes the ride quite harsh vs a coil over set up. In my mind, I'm struggling with understanding why the coils would be less harsh unless the available travel is longer before bottoming out - is that the case, more travel?