lol. perhaps i should elaborate on my answer above, as i was a little distracted when i wrote it.
the answer should be: for the same bitrate, mpeg4 asp (xvid, divx) will usually look (compress) better than mpeg2 (CCE, HC, tmpgenc). however, mpeg2 and mpeg4 avc (AKA h264) are more suited for high definition than mpeg4 asp, regardless of what divx networks might tell you.
also depends on how good the implementation is and what encoder features are used.