The difference is night and day. While the core geometry of the characters remains the same (this isn’t a remaster from the ground up), the surface detail gets a massive upgrade.
6.1. Texture Resolution Strategy
6.2. Material Enhancements
6.3. Memory and Performance Optimization tekken 6 hd texture pack
6.4. Emulator/Runtime Considerations
You cannot install custom textures on original console hardware (PS3/360) without modding the console itself and using custom firmware—which is risky and not recommended for most users. The difference is night and day
The primary targets are emulators: