My post was a quote from the revision release that intel put out. I don't have the PDF at work, but I assure you it was copy pasted
EDIT: I found the link! As you can see, the product codes are identical, the other information is what changed. Retailers don't look at boxes.
http://www.google.com/url?sa=t&rct=j&q=3930k+c2+revision+pdf&source=web&cd=8&ved=0CHAQFjAH&url=http%3A%2F%2Fqdms.intel.com%2Fdm%2Fd.aspx%2FF051E059-17FA-4B21-92E7-025550FBF529%2FPCN111178-00.pdf&ei=4jIjT-6bJMfftgfm3Ji_Dg&usg=AFQjCNE3cJQNvjrxiinGPO0fBXhvaVJPMQ