For a game from 2008, the is generally more convenient because it bundles the necessary compatibility fixes and DLCs that are otherwise hard to find today. However, if you are a purist who wants to apply specific community mods (like high-res texture packs or the "GRID Online" revival), starting with an untouched original is often safer to avoid file conflicts.
Restores 7.1 surround sound and prevents audio-related crashes.