You know Lee/Hoglahoo and I had a great discussion on this and here was the conclusion after a ton of the science stuff..
DE and Disposables use special coatings to make the blades "Slicker" ... On a Straight we do know for sure, besides all the scientific stuff that we believe, that stropping the razor burnishes, and polishes, the edge, making it "Slicker" and if not for any other reason, I am good with just that one