What's Chromium's user agent string?
Yes, Chromium identifies itself as Chrome.
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.52 Safari/537.36
’Course, the operating system and version are probably going to be different.
Actually I remember reading that Chromium's version is different from the Chrome browsers and you could use that to distinguish between the two.