Alright, first things first. Companies make overseas balls usually to match overseas conditons which tend to be different or thats what I have heard, though it seems you have expierenced different. But you have to realize that overseas balls are mostly clones of ones sold here, columbia likes to do this, for reasons I am not sure of. Almost all overseas balls that are 'unique', even to the slightest extent, are almost always sold in Japan, Korea, or Malaysia. Autralia does not have many overseas ball not sold in the USA, though that may change with storms new wave of them (look on thier website). The legality of ball depends on if the ball is on the list, which most of them are, and the company. Columbia tends not to approve most of them, while storm does for example. Here are some examples of balls excluseve to countries and worldwide editions:
Global:
X Factor World
Throttle On!
Specific:
Reaction Knight, Rank, etc (Korea)
SPP 2, Lightning Flash 2 (Korea)
You get the idea...
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"Contemplate the reason you exist..."
Formerly Maelstrom44, Maelstrom X, Maelstrom Zero, Maelstrom Axiom, Maelstrom Flux, Enigma, and Muon Ejector.