I will be trying these yellows soon. I had put together a sample pack on tryablade awhile back including all of the 7OCs and some other Gillette blades. So far I have tried green super stainless, green permasharp, and GSB. I still have black, yellow, platinum, and rubie to test. So far the greens were both really nice, not really any appreciable difference between them to me. The GSB is maybe a little smoother than the greens, but still no real difference in the quality that jumps out at me.