I find any of the Russian PPI blades that I have tried (Gillette Green, Yellow, GSB, Astra SS, and Nacet SS) feel similar to Astra SP for me - they all work well. That said, I found that GSBs last a bit longer than Astra SPs before getting dull, and I also found that my Nacet SS blades seem to rust after 2 shaves - maybe I received a bad batch of the Nacets.