entropy mode cabac versus cavlc in Compressor

I encode to H264 for Vimeo. There is a setting in Compressor that makes me a bit confused, entropy mode cabac and cavlc. As far as I understand cabac will only accept single pass. I use customized preset and I can see that cabac allows multi pass. Is there someone here that could explain the difference between those two settings and the best one for the web. For me the highest possible quality is a must.

YouTube recommends CABAC and multi pass works well with it. You can google lots of detail about the entropy modes, but here is one link that explains it in some detail.

www.streaminglearningcenter.com/articles...overview.html?page=3

Thank you for the link. After reading a lot on the web I think CABAC is the way to go