The top end .idx/.url numbers.

Open the ita.lsc files for both discs and you will see the differences, thankfully its only the .idx/.url files, pretty much everything else is the same.

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Sept 03, M3, Silver Grey. Retro-fits: Modded Mk4 DVD Drive, OEM Bluetooth, VR Control, Rainbow Speaker Upgrade, Sony SOT Amp, HK Sub, CCFL, Intravee II, NightMode.