In Divx movies, I often find some them have low resolutions like 320*288.

Should I use VCD or SVCD to convert these movies?

I know that SVCD can have higher bit rates but the resolution would be streched.(Xvcd can have nice bit rates also)

So is there any quality improvements in the mpeg2 or is it just mainly just for higher bitrates?

Thx,
Ty Welcome