I wanted to try to continue this comparison thread so tonight I did a side by side of my Rocnel 21 and the Tatara Muramasa.
Having used both razors for multiple shaves I know the Muramasa is a much milder adjustable. 2-5 on the Muramasa is the equivalent of the dot to about 3 1/2 on the Rocnel. The Muramasa is lighter and the design changes blade exposure and gap as you adjust from 1 to 5. The dot on the Rocnel is about a 2 on the Muramasa, so the Muramasa is definitely designed for people who prefer very little if any blade feel.
I used ETHOS peppermint soap and AS
I used a new Poland Polsilver blade in each razor.
Pacific company cork brush synthetic which whipped up a terrific lather in my Copper Capt. Choice bowl.
1st pass WTG. I set the Rocnel at 3 1/2 and the Muramasa at 5. Both razors were extremely smooth, the Muramasa was easier to whip around, as it is lighter. Blade feel was there on both razors, but not to a huge level. The Rocnel definitely took down a little more of my 2 day beard after the first pass.
2nd pass XTG. I dropped the Muramasa to level 4 and the Rocnel to level 3. Extremely smooth pass and in the end the Rocnel was BBS on my cheeks and the jawline and neck needed an ATG pass as the Muramasa was DFS everywhere but definitely needed a 3 rd pass for BBS.
3rd pass ATG. I dialed both razor down to 2 and was rewarded with a very smooth, mindless pass. Rinse and felt both sides were BBS. I will see what the duration is for both sides.
For me the Muramasa is a fantastic engineering design, that fully come apart and requires no spring for its adjustment, but it is definitely a razor for guys who prefer a milder razor. I need to go to 5 before there is significant blade feel. The Rocnel does not dial down to the lowest levels of no blade feel but delivers an extremely smooth shave, it is heavy but well balanced, and can easily give me a 2 pass BBS on higher levels.
If you prefer no blade feel or minimal blade feel the Muramasa is right up your alley, but if you want a razor that can cover a Wolfman WR2 from about 1.05 easily past 1.65 get a Rocnel 21 or his new master series.