LogicalOne gear....
I will see if I can grab the specific COG later when I have access to the software. Although I am not family with the Mizuno’s, TM’s or Muira’s, I would guess the COG is going to be a little lower with the L1.XX’s.
As far as similarities, I can’t say that either. lol I start with a design/concept and what I want to accomplish with the iron head and then start piecing everything together based off of prioritization. When making adjustments I use a weighting calculation (values) to help determine and finalize the initial prototype shape.
Ok, so that was a bit of a ramblings of a madman response there. lol 
Yes, available as heads only and should be VERY reasonably priced (I hope). Here are the offsets (in mm).
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Go ahead and sign me up for a set of heads, 2 degrees upright. 
.......oh, and that 31 and 36 degree hybrid with the .335 hosel. 
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This is the view that is most inviting to me. Looks so hittable....
LogicalOne Yes, available as heads only and should be VERY reasonably priced (I hope).
Methinks I’ve found something to put on my new LogicalOne Steel Shafts…
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Very pleasing to the eye. Sole view?
Added.
LogicalOne imo, the 1st pic is a bit misleading as to width of sole. All other pics look great, more what I'd expect/want!
Lofts??
Nice....very playas shovel'esque 
Dang. 
ode thoughts on the finish?
About missed this one. I am thinking satin but I might do one of the prototypes in black as well to see what it looks like.
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LogicalOne Thanks.....for not being a crazy person.
It let's 'some' people put the 6i back in the bag. And you don't have to sell 7-PW/GW, as we 'might' ask for. 
That sole grind looks good too. I'm getting a set.