>>84036891They're both pretty bad, the only difference being that /co/ started off as a containment board for people that wouldn't stop making Power Girl and Black Cat threads on /a/.
As for moderation, /v/ is a better. Mods only browse threads that interest them on /co/, you can talk about anime here or started a thread with a nsfw image and not get banned for an hour or more. Hell, going off of deletion patterns the mods that browse the Toonami threads only live on the west coast.