No dude the difference is massive. Most divx movies are 800meg the Brrips are double that. The quality is far far superior to divx i think.
My understanding is as follows -
- BRrips are XVID encoded, but from a BD ripped file e.g. a MKV encoded file
- BDrips are XVID encoded, but directly from the actual source Bluray disk
- DVDrips are XVID encoded, obviously from a DVD
In all three cases it is still an
Xvid encode, only the source differ. I'm not sure if the source will make a big difference. Size is the determinant of quality. That's why the 2Gb+ encodes of yours look so good - the bit rate is much higher than a 700Mb encode. But you can also rip a DVD to 2Gb Xvid and the quality would probably exactly the same.
EDIT/ now that I think about it - the BR/BRrips are probably encoded at a larger resolution than DVDrips too, so that would also increase quality. Although encoding is done by the same engine (xvid), so at a larger resolution the bitrate will be less than 'n comparable size DVDrip decreasing quality again. Hmmm...would be interesting to compare two rips at the same file size.
I'm confident though that, when the same encoding is used (xvid) then file size is by far the biggest factor in determining quality.