Would the difference between Poorboy's Professional Polish and Polish w/ Carnuba be that PwC is more of a, "all-in-one" product, and Professional Polish is a last step before wax or sealant??? Anyone using these polishes care to give their input on the differences? I'm curious to try one out and since im ordering from smp I figure I pick up one of the two. Is there a difference in durability or shine from the two products? Thanks in Advance!