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The Skyship 600 is the most advanced blimp ever built. It is 59 meters long compared to the 75 meters of the Zeppelin NT. It's diameter is 15.2 meters compared to the 14.16 meters of the NT.
So the Skyship 600 is 16 meters shorter than the NT, has 434 kg more payload, can carry equal amount of passengers as the NT, and is only slightly higher and wider ( but much shorter )
The reason for all of this: the Skyship 600 only has 2 (porsche) ducted fans, while the Zeppelin NT has 3 engines and an internal frame. The Skyship 600 also has a more luxurious interior but it is louder inside.
However, I would still go for the Zeppelin NT. Yes, it's a bit longer, but the back engine is a massive revolution when it comes to airships. The skyship 600 engines are vectoring, but hovering is still much harder due to the lack of an aft engine. However, it's still a very impressive blimp, and beats all previous blimps.
