Depends what one you get. The '09 echo lites came in short (1000 wb) and long (1020 wb), the 2011 were 1020 wb and the 2012 version is 1000wb. Can't say anything about any of the older echoes however.
Also answering your original question, I know 2 people with koxx yellows and they're really nice bikes to ride, really bouncy and easy to flick about