I haven't tried Astra's but have tried both Shark and Derby's in my R89 and found the Sharks much better, found the Derby's actually quite good in my 38C Barberpole but they did seem to blunt a lot quicker than the other (for the price though they are fine).
I don't know about anybody else but I always find the 2nd shave with a blade is the best one I get esp. the Feathers.
I don't know about anybody else but I always find the 2nd shave with a blade is the best one I get esp. the Feathers.