Andrea Rossi's Quark, if tested and verified to perform as claimed, is an advanced cold fusion technology that screams of simplicity and elegance. The general consensus from those I speak to is that the Quark is simply a hollow cylinder composed of one or more heat resistant substances (perhaps both sapphire and a custom made material) containing the fuel "charge." This central tube may in some variations be fully or partially surrounded by a second cylinder (perhaps to thermalize the light and/or protect the eyes). The ends of the tube are connected to wires that provide electricity, probably in the form of specially selected waveforms. If Rossi's assertions are correct, for .5 watts of input the device can produce 20 watts of output in the form of thermal energy -- although these numbers are non-final and in flux. In some variations, a portion of the output can also be in the form of light and electricity.
The above described device is a BIG DEAL. Such performance, even with a "mere" COP of 40 and only 20 watts of output, would provide a breakthrough energy source for the world. And once further developed by teams of professional engineers -- after the initial commercialization phases are complete -- the technology would obviously advance further. Tiny form factor, ultra high temperatures, high power output, simple construction, cheap fuel: any improvement in what has been claimed already would seem a little like trying to push the anti-matter engines of the Star Ship Enterprise a little harder when they are already propelling the ship at warp nine.
Conversely, Black Light Power's Suncell does not impress me nearly to the same degree. To begin with, the device is complex with numerous sub-systems all requiring cutting edge technology. This is not even counting the as of yet untested (unless I'm wrong) high intensity solar panel apparatus required to convert the light generated by the system into electricity. On the surface, there seem to be countless critical mechanisms in the Suncell that could be very prone to failure.
Of course the Suncell might work -- just like the last half dozen or more "breakthroughs" proclaimed by Randell Mills over the past twenty years might have worked. I've watched BLP over the years and read press releases describing a wide array of systems they proclaimed were about to be IMMEDIATELY COMMERCIALIZED. Repeatedly after many PDFs being posted and much hype being spread, nothing happened, with little explanation as to why.
So when it comes to the Suncell, I see three major tasks for Black Light Power.
1) Prove that their intentions for the Suncell are any different than the various other technologies they have declared were close to commercialization in the past. Can they truly prove they are not going to drop this device like a hot potato in a few months and move on, yet again, to something else?
2) Prove that the Suncell actually produces the power output they claim for long periods of time. Can they run a Suncell for several hours or a day and use convincing calorimetry to prove the massive power output they are proclaiming?
3) Prove that the Suncell can operate continually, reliably, and consistently -- without constant failures of critical components -- for months or longer. The COP and power output figures they predict for their final products are enormously exciting. However, I find it challenging, although not impossible, to believe such a complex device can function without breakdown for even a couple months. What they need to perform is a torture test. When will the first one be scheduled?
There's a chance that BLP may prove the above three issues. I think it would be pretty exciting if they did. But even in the best case, their system would still lag the still unverified Quark.
In my thinking, both of these systems probably utilize LENR processes -- perhaps very similar ones. I find it plausible that similar conditions are present both in the molten silver streams of the Suncell and the hydrogen filled micro-structures (cavities, bubbles, voids) of the nickel or other metal particles in the E-Cat and Quark. In these tiny small cavities or bubbles, enormous pressures and temperatures could be created that rival those in the Suncell. So, in one line of thinking, a single Quark reactor could contain a million nanometer sized Suncells! This elegant setup would not require any of the complicated sub-systems required by the Suncell. Instead, the nickel or metal particles in the Quark produce their own LENR reactors.
I am eager to see what happens with both of these technologies. But I'm convinced that if they both make it onto the market, the victor is already known.