this past week I did a comparison of these 3 blades from shark. I had 3 Slim razors out at the same time each loaded with the respective blades on setting 3. this way I was able to immediately compare the difference of each blade on subsequent strokes. I did this over several days with everything being identical but the blades. I mixed up the slim razor and blades combination to take into any consideration in case each slim razor shaved a bit differently.
while not scientific I can say each time the platinum came out best and the chrome and stainless steel were basically identical. I would even grab a razor without seeing which blade was which to take out any perceived bias and each time I could tell which was the platinum. the rest of the time it was hard to tell when it came to the chrome vs SS.
I still got great shaves from those two but the platinum was just a bit smoother. ymmv of course.
while not scientific I can say each time the platinum came out best and the chrome and stainless steel were basically identical. I would even grab a razor without seeing which blade was which to take out any perceived bias and each time I could tell which was the platinum. the rest of the time it was hard to tell when it came to the chrome vs SS.
I still got great shaves from those two but the platinum was just a bit smoother. ymmv of course.