The Genius Code course has far more material than Wenger's book 'The Einstein Factor.' It includes not just more in-depth information about the Image Streaming process, but other topics not talked about at all in EF.
Of course, I haven't yet ordered Genius Code, so I don't know how truely accurate I can be, but based on my activation of The Einstein Factor, and the listed course content on the site, as well as the posts from this message board, I've come to that conclusion. 