Anyone who knows 3D SPI Of SINIC-TEK?

Our factory is currently evaluating three machines, KY8300, PARMI SPI, CKD 3D SPI. A few days ago another supplier sent SINIC-TEK S450. The results of a few days we were surprised, the performance with the front Three SPI is almost the same, the most surprising is the price, a friend know this Chinese manufacturers what?

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