Not addressing your questions/categories…I went through a bunch of razors before essentially settling on two: Masamune and medium aluminum Henson. It became a very marginal gain game and those two, fairly mild and paired with very sharp blades, worked best. A bunch of high end modern and vintage Gillettes have been sold since. Of those, the only two that were under consideration to keep were a Wolfman WR2 (too efficient for my face) and a Fatboy.