If I were in the market today I'd buy the "Twist" I just already have (and like) a Grande and can't justify buying it.
Will the Muhle/EJ 89 heads fit Merkur three-piece razor handles? I have a ten-year old EJ Chatsworth DE that came fitted with a classic Merkur head. I would like to upgrade to a Muhle head for the Chatsworth handle, if they're compatible fit. I don't know if the thread pattern for the Muhle head is different from the Merkur, though.
Also, for those who know, how does the Muhle/EJ head compare to the Merkur classic? Milder? Better tolerances? No differences?
They're all metric M5 x 0.8 ...
Most people seem to think the Merkurs are a little bit more aggressive.