It's a horse a piece, Scent Blocker actually pays Scent Loc royalties because Scent Loc has patents that Scent Blockers uses.
As mobowhuntr is right, wind is very inconsistent and not true. I hunt where it swirls from 1 moment to the next, plus that elusive buck never comes down the right path you hoped, especially as I try to keep switching my stands. But you can't go wrong with either scent clothing company, it comes down to just want you want. Put it this way, the scent controlling suit can only help you.