This probably wont help you, but of the three you have listed I am only familiar with the Henkles Friodur.

Some of the guys have mentioned it is a bit more difficult to hone. I found it very easy to hone; and, it was an absolutely great shaver! I say "was" because I gifted mine away to my best friend (he's not even str8 shaving now ).

You need a member who is familiar with all three razors, I guess.

Good luck -

Steve