Comparing the two cameras, the Sony has a larger APS-C sensor compared to Olympus's 4/3rds.
But not having used either camera before, I cannot say anything other than my statement above. Now looking at the prices of those two cameras + their standard kit lens, Nikon also has the D3100 which is in a similar price range or a Canon 1100D which is just a tad bit more expensive. Is there any particular reason why you would want a Sony or Olympus DSLR when Nikon/Canon has something close to the same price range?
