If the quality is the same as the BLF A6 then im getting one asap . lol . i know the max lumens output for the emisar is overkill for anything practical but its still nice to have that super bright burst coming from such a small light.
Assuming that it is indeed a quad with Ledil Angie-S optic, the light is at least longer because the optic is longer than the Carclo 10622 (well, just by 3mm actually), the output should be about the same as the D4, but with a bit longer turbo-time, the throw should be considerably better: a narrower hotspot.
Well if the D4 is transposed to the D4S, then maybe Hank will turn the D4 into a Meteor M43 like light; basically four D4 lights into one M43 form factor with 4x4 emitters.
I also wonder if the extra length is for some of the jumbo-sized 26650 cells out there or maybe with a sleeve to accommodate a 21700. Looks cool anyway.