The SCPH-90001 BIOS is objectively newer (v2.30) and contains security/stability patches. However, for emulation, preservation, or homebrew, it is not universally better – earlier BIOS (e.g., SCPH-39001) offers broader compatibility. The “better new” meme likely stems from casual users valuing anti-piracy and DVD speed over modding flexibility.

Recommendation:

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Once you have your dump, check these identifiers in PCSX2 (Emulation Settings -> BIOS):

If you see a date older than 2008, you have an inferior BIOS.

In the world of retro gaming, the word "new" is often treated with suspicion. For the PlayStation 2, the holy grail is usually the early "fat" models (like the SCPH-10000 or 50000) which featured the Emotional Engine processor constructed in a way that provided full backward compatibility with PS1 hardware. However, among the "slim" redesigns, the SCPH-90001 (and its BIOS counterpart) occupies a unique and arguably superior position.

If you are looking for a daily driver in 2024, the SCPH-90001 is often the "better new" choice for three specific reasons: power efficiency, laser reliability, and modern convenience.