With the cost of Zaire I understand this is hard for people to do, but I always tell people to buy a Zaire colony complete at the same time to ensure that they are all at least the same fish.
If you buy a fish here and there, though they all may be Moba, they may look different and not quite match.
sometimes its simply because Japan pays more for the top quality, so sometimes we get whats left.
So if you got the best batch of one shipment, and then next year the worst, you may think you got a different fish,when in fact they are the same, just not the cream.
So yes, the hobbyist is at the mercy of the seller, who is at the mercy of the exporter/collector, who is at the mercy of the Diver.