I would rate Xvid slightly above DivX5 because it retains more detial than DivX5, but only slightly. SBC encodings with nandub absolutly blow when compared to XVid or DivX5...too much noise. I've done my own comparisons of DivX5 and XVid. I switched over to Xvid because it retained more of the original image. Now they are going to add b-frames which will make it absolutly an outstanding codec