I think my favorite is PolSilver Super Iridium. I got the best shave with one of those.
... and the new Shark Platinum from Egypt...
New Shark Platinum? When I first got into DE razors, I bought a 100-pack of Sharks. Hated them. This was about 4 or 5 years ago. Have they improved since?
Gillette 7 O'Clock Platinum (Russian Blue), still my favorite Russian blade after all these years.
According to the guy with the Gillette connection who used to post here the GSB is the same blade, just renamed.
I have both GSB and Gillette Platinum. I have compared them side by side in identical razors during the same shave and cannot tell any difference between them. Thus, I believe they are the same blade in a different wrapper.