Well there are a lot of factors going into what makes this foil great from what I have seen, and tested, and trying to compare, as I’m getting this question a lot! Should make a canned response 
The mast is thinner, the fuse is thinner, the whole set up is much lighter. There is just a frictionless feel to it.
The 11mm mast is not as stiff as the 13mm mast. it’s not that they can’t make it as stiff it was designed for DW foiling, and turning with reaction. On land everyone grabs the foil and bends it side to side and says it’s not very stiff, but didn’t twist it or foil it?
So from riding this mast, and foils I have dug pretty deep into my Soul and talk to Chris regarding why we are all looking for Stiff and this it was I have come to understand from the feels
When we say a mast flexes we are usually talking about lateral bending the mast can move a little side-to-side under load. This is different from torsional stiffenss , which is how much the mast resists twisting along its length, like wringing out a towel
Lateral flex in a mast with controlled flex can absorb chop smooth out the ride and give feedback through your feet Too much flex, though, and it feels delayed like the foil lags behind your input.
Torsional stiffness, twist resistance?
This is about precision and control. A mast that twists under load feels like the foil is “sloppy,” especially when carving or pumping. High torsional stiffness gives your front foot input instantly translates into wing angle change and direction. That’s why this foils feels so good to turn at a 12.5AR
So my thought is this DW mast that has lateral flex but torsion stiffness was designed to give you the goods of both worlds. Flex lateral feels like a Softer ride, better in turbulence, smoother connection to the water.but ultra stiff torsionally has razor-sharp turns and pumps, no loss of precision. I’m getting the feel without losing control.
I am rethinking everything I know about “stiffness” after talking to Chris about the load testing they do 
Comparing codeR to this orca. Am I comparing low end to high end, turning and surfing?
I have only tried the 800 orca with the XS 135 ( 60.5cm) and the 685 with the S 135 ( 66cm)
The 685 has as much low end in the glide as the 770 seems to need slightly more speed to take off, but maybe just slightly. But it gets up to speed faster as the set up is lighter and thinner. The 800 might have a similar low end once up on foil to the 960R, but glides at speeds similar to the 770R at speed. so sum it up, they have better range to them, then they surf sharper and more reactive.
Again the code mast is about 14-15mm, and this is 11mm, there has to be an equation there.
Walt tried the 13mm 75 TE back to back to the TE DW 11mm 75 mast ( non production, so slightly left stiff 11mm to the one I have)
He said : “Yeah man, there’s something about these 13 mm. It’s like the foil section They’re using on the mast creates much more lift where the mast wants to go straight and fights You on the turns. It’s a very radical difference from the skinny mast I have”
So I’m thinking he is taking about the “Flex” we have in the 11mm DW TE mast.
I did prone the 685 with the S 135 on the AMP FliteLAB board with 2 batteries. I was not used to it in the surf as much as DW it, so my turns were more safety, but I could pump it back 8 sets with no issue at all, every pump I would just go faster, and it’s easy to keep the foil up high. You pump one time and it would set up high in the mast and hold.
Sorry it’s been a hectic few weeks my Brain hurts with all this thinking
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