Same to me. Platinum are by far the best of the bunch. I can't get along with Chrome blades; probably my fault still didn't match THE RAZOR for them.I have tried the Shark super chrome blades and despise them. They are neither sharp enough for my beard nor smooth enough for my face. I have not tried the Shark super stainless, but the reviews I have read seem to indicate they are no better than the chromes. I do not plan to use the ones I have remaining.
I have purchased both Shark Platinum and Lord Platinum blades. The seem like the same blade to me. They are both sharp and smooth so they are blades that I do use.
But I can get excellent shaves from the Stainless ones also.