difference between china/new zealand EQ iron heads

I thought EQ heads was new zealand only item but I see some on ebay advertized as EQ but are made in china. thank you for your time. RR
I bought the original made in New Zealand heads back in 2016, now they are made in China I guess. The made in NZ heads ends are significantly different from the China versions, the chambers of the NZ heads casting has a finer vs coarser finish, the color of the as cast iron is different as well. Among other things. The NZ head was a high quality finished piece.

NZ chamber texture:

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Look at the single flat surface of the ends of the heads, no core plugs:

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The latest version with core plugs and very heart shaped chamber, more pronounced than the NZ chamber:

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