cocoa-websocket

So, following up on the link in another comment on this article [1] to socket.IO-objc [2], one goes through a few forks of cocoa-websocket [3,4,5] to arrive at zimt [6]. Are there reasons to use SocketRocket over these other libraries (either socket.IO-objc, or the various forked lineage of cocoa-websocket/zimt)? (Also, to ask the question I always have to ask: is there a reason for a new library rather than contributing to one of the existing ones, possibly even helping Unitt support RFC6455?) [1] http://news.ycombinator.com/item?id=3563527 [2] https://github.com/pkyeck/socket.IO-objc [3] https://github.com/samlown/cocoa-websocket [4] https://github.com/adamjernst/cocoa-websocket [5] https://github.com/erichocean/cocoa-websocket [6] https://github.com/esad/zimt