I suppose that almost all regular computer users use the Dvix basic since the basic version is already sufficient and paying money for the pro version doesn’t seems to be reasonable when we have the free version. But if you want to try Divx pro, the good news it is available to be downloaded for limited time for free for both Windows and Mac users.
I’m not sure about the advantages though, but according to the manufacture Divx Pro enables 30% better compression and visual quality over the normal DivX codec and takes advantage of professional encoding tools like EKG to provide the highest visual quality at the lowest possible bitrates. Have a try!
Download homepage: Windows | Mac Source: Gizmodo