The PSP had only 2 MB of VRAM versus the PS2's 4 MB. Consequently, PSP textures are heavily compressed using a scheme similar to DXT1. Viewing these assets on a modern monitor reveals visible and graininess, especially on clothing and road surfaces.
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Because both versions use lossy compression, AI upscaling projects (like those on LibertyCity.net) have rebuilt textures from scratch. However, they always choose the PS2 textures as a base due to their higher starting resolution. The PSP had only 2 MB of VRAM versus the PS2's 4 MB
Developing an open-world game for a 333MHz processor with only 32MB of RAM forced massive compromises in asset design. Poly-Count Management This public link is valid for 7 days
The unique "Empire" assets (protection money briefcases, defense turrets, and gang decor) are identical in modeling but use different color grading. PSP leans purple/teal (mimicking Miami Vice the TV show); PS2 leans orange/sepia (mimicking Scarface ).
The audio landscape of Vice City Stories is another area where the two versions diverge. The PSP version recycles the same sound schemes from Grand Theft Auto: Vice City and Liberty City Stories for many weapons. The PS2 version, however, has some notable differences, including:
: Sound effects for weapons, vehicles, and ambient noises were realistic and added to the immersion of the game.