I am trying a scientific experiment in order to determine which shaves better unaided by hand or technique

First I lay out a grid on my cheek. Using each:a small hollow ground razor weighing 50 grams, and a large wedge weighing 100 grams.

Laying one in its turn against my cheek, and allowed to fall naturally. I should, by subtracting my weight each time from a predetermined total, be able to determine what mass of whisker was removed at each trial....

What should have been been plainly obvious is now painfully obvious: that it is only by variables of angle, pressure and applied force that different grinds, sizes and styles are capable of equal result.