After doing some searching I can't seem to find all the answers to my current question. What is the difference in each of the Merkur open comb razors. I have found they make at least 5... 41c , 1904, 15c, 11c, 25c. I quite interested in trying an open comb but not sure which one to pick. So to anyone who has some of these razors how do they compare? I'm looking at different qualities such as weight, length, aggressiveness, and so on.