There is DDR3, LPDDR3, DDR4, LPDDR4 versions(??).
2/8 memory - 2/16 - 3/16 - 3/32 - 3/64?
WiFi and Ethernet will be different depending on who/when manufactured.
They are all q201 family. But choosing the wrong firmware is too easy.

**Be sure you know how to unbrick your device before jumping to flashing...anything.. **
4PDA Russian forums may also have what you need?
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