nearly, almost, same difference. Voice acting and story is not anywhere close to HL2, and it length is not going to be the 36+ hours that HL2 is going to be. The graphics, physics and all that stuff are good, looks like the Unreal Warfare Engine, but HL2, from the videos and all info released from Valve and other sources, will definitely be more polished on the design side then what Chrome is. Also, the level of detail, facialexpressions, moist, smooth moving eyes, bump-mapped textures, that exists in HL2 is not in Chrome at all. Yes the eyes move in chrome, but very choppily, and the textures, especially the environment ones, are what I would have expected from a game released last year. Don't get me wrong, I like Chrome, but it does have a few design-side flaws, which, because of how fun the game is, I can overlook.
Also on a side note, whats the release date for Chrome in the US, cuz I dont feel like importing it from Britian.