We are asked this question again and again and the answer to it is always very subjective, depending on who you ask. Here is the answer from our managing director Mr. Wiethoff:
"For new and inexperienced users of a safety razor I recommend a rather simple model like the MERKUR 23C or the MERKUR 33C. The razors with a fixed blade gap are all relatively similar.
Anyone interested in a particularly gentle shave should take a look at the MERKUR 15C and MERKUR 25C. Theoretically, razors with a tooth comb are gentler because the blade rests on several teeth and therefore vibrates less than with a closed comb."