[Sega CD] Issues with 2x Sonic Beta

[TheShadowRunner]

There are 2x "CD Sonic the Hedgehog" beta dumps with, I believe, naming/region issues:

-93.5.13
https://redump.info/disc/67692/
This one is marked Japan but boots as USA (requires USA bios)..?

-93.6.21
https://redump.info/disc/67693/
This entry is titled "CD Sonic the Hedgehog" although the title screen has already been altered to "Sonic the Hedgehog CD" like the final game..

Any input welcome!

[Deterous]

-93.5.13
The header has it marked as Japan only?

-93.6.21
The header still says CD-SONIC THE HEGEHOG and the disc label is written as CD-Sonic, so it's not obvious.

[TheShadowRunner]

-93.5.13
Yes... but something funky is going on.
On real hardware, unmodified JP VA4 + Megasd, it will only boot with US bios. Forcing JP bios loads it as an audio disc, with no option to launch CD-ROM/Program.
Similar behavior on emu (Kega Fusion), bios auto-selection boots it as US and forcing JP bios doesn't allow to launch it, like on real hardware..

-93.6.21
Doesn't the title screen take precedence ? I would have thought so, but yeah not obvious when the rest says otherwise.

Thanks!