Thank-you for the redumps.
As for mirroring bit differences, if a game has mapper-controlled mirroring, then the mirroring bit in the NES header is meaningless, and should be set to "0" (which happens to mean Horizontal mirroring.)
The Nanjing mapper 163, which uses a chipset also used by Waixing and Mars Productions, has never been reverse-engineered fully, so it's actually unknown whether it has mapper-controlled mirroring or not, and the precise function of the "unlock register" at $5300.
I have written some notes based on debugging the various games that use this chipset (mappers 162, 163 and 164).
"Diablo (NJ037 — 暗黑破坏神 — Ànhēi Pòhuài Shén)" has sufficient amoungs of NOPs compared to the public dump to justify calling it a hack.
Does "The Mummy" use the Waixing FS304 circuit board? According to my notes, it should.
"Sword Dancer (剑舞者 — Jiàn Wǔ Zhě)" It's probably a Coolboy release of another Waixing game. I should be able to say once it is dumped.