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Arcadia YF-19 on the left and yamato VF-19 on the right.
Bandai "VF"-19 in the middle.
To make a VF-19 out of the bandai totally-not-a-YF-19 you might be able to re-use some parts of the arms, the landing gears and some internal hinges and things but basically they need a completely new mold. Every part of the 2 planes is slightly different.