I have owned my Mühle for 6 months or so and it has become my favourite DE razor. I stopped in a small store on the way home this evening and purchased a Merkur 34 to try out- upon arriving home I found that someone had requested a comparison between the two razors following a SOTD post that I made this morning. Perfect timing!
(L) Mühle 89 (R) Merkur 34
As the photo shows, the Mühle has a longer handle than the Merkur and to my eyes the Mühle wins on elegance and quality of finish. I will shave with my new Merkur tomorrow morning and come back to add some more thoughts after doing so.
If you have tried either (or even better both) of these modern classics please feel free to add something to the soup.