How so, when skysails talks about "Venyo harnesses the power of high-altitude winds with speeds of 13 m/s and a continuous output of up to 200 kW." while the S1500 is featured with "Inside this duct are 12 turbine-generator sets, each rated at 100 kW."?
It's more like factor 5-6.

What matters is scalability and how much material and cost you need to produce per energy unit. Kites (either parasails or fixed wing) are much simpler, can be scaled up too, and you only need a simple cable that pulls the generator's winch. Overall kites seem much more efficient to scale up.

IDK, the benefit to the goofy kite design is that the aerial portion is far simpler - and there's no massive energized cable hanging in the air. It's a little... non-conventional, but it's a great deal less complicated than floating a massive generator like the chinese solution. Downside is presumably lower energy density per unit, but the reduction in operational footprint might make the two designs competitive. It's good people are exploring both options!

Fair, but please name one single way to generate that kind of electrical power that can be fixed by a layperson in case something crashes.