MvO wrote: decisions decisions...
While I don't use a Quest, I would also assert that you would have greater control with the Huky, certainly in terms of heat production, ventilation strength and fan control, without having to resort to additional boosters such as a heat gun for higher batch sizes. There's less hysteresis with a gas burner, which means that heat can be delivered and reduced with quicker response, which is good for any course corrections if they come up. This becomes more exception than rule, once you settle into a rhythm of using your preferred batch sizes and bean varietals - it really does become more automatic after awhile; when to apply heat and fan appropriately to control the roast, etc. That said, keep in mind with a large gas burner, there is not really an upper end to power, and so you do really need a MET probe as your primary metric for roast control and keeping any eye on drum temps, and its good that Kuanho provides this option now.
Flexibility with the Huky - in that you are free to choose drum type, burner, and exhaust setup - is admittedly somewhat of a double-edged sword in that it presents a kind of "Roastivors Dilemma" of decision-making that you are not burdened with when getting Hottop or Quest, where the decision is made for you. OTOH, you are freer to experiment with the Huky configuration, since is it has a kind of a "Maker" flare to it that invites experimentation. It's in no way an appliance and you need to adapt it to your setup, namely due to gas fuel used as a heat source instead of electricity. The good news is that Kuanho provides a number of integration options to help this along.
I realize now that it's the heat source that really anchors the kind of machine the Huky is versus the Quest. The Huky is really more a poor-man's Mini 500 than richer-man's Hottop or alternative to the Quest. You have to be deliberate in the choice of having a gas setup. For some, this is a going-concern and not an issue since they already have a gas source, whereas for others they would have to commit to adding a gas source. For my circumstance, I choose to integrate the Huky with my Bluestar stovetop range in my kitchen, and so I enjoy roasting indoors the same as those who choose to roast indoors with a Quest or Hottop. Once you have your setup down, ease of use is not a problem. That said, nothing beats the portability of a plug-in device of an all-electric roaster.
The other "Roastivors Dilemma" choice that keeps coming up is solid versus perforated drum, and the affect this choice has on the operational characteristics of the Huky and resultant roast profiles. For example, choosing a solid drum changes the flow path of ventilation in the system significantly, but this change would be more in line with how the Quest air flow path works. As such, comparing the performance a solid drum Huky to a Quest may be a more fruitful comparison, and at similar relative batch sizes.
Regarding batch size, the lower limit on the Huky is about 150g, anything less means the that the bean mass does not cover the temperature probes, and your BT readings will register higher. On the upper end, you'll never have to heat gun your way to 300g and beyond.
So overall, MV, I think you've touched on the main differences already. The Quest is more self-contained and proven with an established user base and the Huky is more flexible with greater capacity, but still in the latter stages if early adoption, with avenues yet to be charted. It is not clear quite yet if the so-called adoption "chasm" has been crossed for the Huky, at least in the English-speaking market. If you are comfortable with this, then the choice is yours, and hence the "dilemma".
If only you can see what I've seen with your eyes.