You cannot just say Gillette 7 O'Clock as there are four different blades in the 7 O'Clock lineup. There are the Sharpedge Yellows from Russia, the Super Stainless Russian Greens, the Permasharp Indian Greens and the Super Platinum Blacks from India. Although the two greens are somewhat similar, there is a huge difference between the Yellows and Blacks.
Apologies...the green Russian one.