Picked some from all of them, and the Xi'an green sure seems like a winner, it is a very generative plant with big fruit (in my book big fruit is good for all growers, it saves you from picking it too late waiting for it to grow). I expect the Green Dragon is just a selection of this one, with slightly more elongated fruit (quite slightly) and more straight fruit, less productive it seems, but possibly a bit better fruit quality.
Mitoyo for now is disappointing in terms of production, and it was really my most hyped one, was wanting it since a few years. The fruit is just small (shape and color match with how it should be), not sure why, it had a lot of pollen and the plant is healthy. Hopefully the second batch will grow bigger.
Aswad is big but not as big as one would expect from those insanely thick fruit stems. What surprised me is how tender the skin is on this one, cooked you can't feel it, which is the opposite of the usual 'black' ones.
Kurume has very good fruit quality, but like all longer ones is again very stingy with fruit, maybe they need warmer conditions or more sun.
In order: Xi'an purple jar (1lb), Xi'an green (1.2lb), Kurume (0.5 lb), 2x Green dragon (a bit less than one lb) vs 2x Mitoyo (no lb
).