I give it a stab... All you science types please correct me if I am wrong! ;-)
The .5 OCCs contain more wire which translates to more surface area. Given the same amount of wattage (heat) on the coil as a whole that should mean that the heat is spread out wider. This would mean that the actual temp of the wire in contact with the juice & cotton is lower. Also since the wire is bigger the area where the juice is being boiled (vaporized) stays lower down and in closer contact with the cotton. This would allow the cotton to absorb the components in the juice that don't like to vaporize. These are usually sweeteners & tobacco flavor elements. When these hard to vaporize elements get up high on the wire they will stick to it and accumulate. Once stuck to your wire they keep getting cooked over and over with each vape which is where we get those ugly formations of gunk and scale. The gunk and scale will also reduce the efficiency of the coil which leads to things like popping and spitting, nasty flavors. etc.
Since you are using a sweet juice with good results sounds like you might be onto something here. I LOVE sweet juices so I might have to give this a try myself. THANKS FOR SHARING!
You make some
very interesting observations here Mr. R!
Even though these coils are massively big, massively hot, they're really gunking, end-to-end, hmmm. I think you're right. But not the same heat over a larger area, lots more. In fact
the pictures I took show the effects of that.
An interesting notion that
juice can exude from the wick yet still not vaporize. I agree, 100%.
There is a thing called the thermal (evaporation) zone. It resides in extreme proximity to the wire itself. The closer to normal atmospheric pressure, the higher the vaporization temperature that the liquid must reach to evaporate. Open winds don't build as high internal pressures as microcoils I'd suggest here. So heat and expansion send more juice to the wick surface without reaching vape temp. Considerable amounts do while very hot contact the coil. What happens to hot organics (like food) when they hit a an extremely hot dry surface? Simple answer, char.
Juice that just heats up outside of the TZ...
like between spacing of coils
will just cook. If you're getting high vapor output it's due to the over-abundance of power
needed for this level of production. But high output energy doesn't
necessarily mean high-efficiency, as in this case, a clean operation.
Also inefficient spaced winds overcome the intermittent dispersal of the TZ with lots of power. This produces
diffusion of the portion of the juice flow that was vaporized. That is, heating and expansion of the vapor...
after the fact. It's actually
[not/I] more vaporization exactly; but, an increase of partial vaporization. That is, perhaps over what we're accustomed to seeing from a clearo.
What didn't get vaporized, you ask? You're looking at it
So you're right Mr. R, the wire temp's may be higher. But the surface temp's as a ratio to the coil surface overall are lower. And not enough to vaporize the rate of flow of fluid.
But clouds and flavor can coexist with a smart design and that's why we can blow it out of the park rebuilding.
Thx your thoughts Mr. R.
Good luck.

p.s. Close contact to cotton is not particularly a feature of these new coils any more than previously. In part that's what's contributing to accretion. It's tight but not a controlled and uniform tightness, enough to compensate for gravity sag with use. Not a user-friendly environment either in the replacement coils to adjust for that. The OCC head is not a rebuildable/rewickable platform. Not intended or designed to be. It's a single use device. A consumable. So cotton, rayon, etc. of variable shape and density are not the practical media for those of us who can't be constantly rebuilding. Why I applaud Kanger for finally incorporating an RBA. But if we're expecting a different result using the same means of production in an OCC
hehhhh. I wouldn't count on it.