WCD:

* The biggest music archive in the trackers' world, 300TB+ Perfect FLAC resources AFAIK
* A hell lot of western music, but extremely short of asian music
* A very nice request section that can give you the results in surprise
* Hard to keep your ratio (comparing to other music trackers)
* Everything can be reposted

OCD:

* The only music tracker in China
* All resources are in lossless quality
* Most of the torrents on there are asian music and classical music
* Easy to keep your ratio (comparing to other music trackers)
* The uploader can decide whether the torrents are exclusive or not, and there is also a section for owners' ripping with HQ scans