Hello, I've been looking for some new headphones lately and looking on the Audio Technica website and i came across something called the ATH-WS770is and ATH-WS550is. So i decided to do some more research on the pair and ii found next to nothing. I was wondering of anyone knew anything about them. Their specs seem near identical to the PRO700Mk2's but I just want to see if there is anything special about them. Thanks in advance.