Basically, the Einstein Factor tape set is an audio version of the ideas in Win Wenger's book of the same name. The Genius Code audio course explains the ideas in the Einstein Factor book, and also guides you through the processes along with Win Wenger himself. The Genius Code is more experiential rather than simply a how-to. In addition, the Genius Code includes Lucid Dreaming, Direct Learning, and PhotoReading.
For more comparisons, check out the forum archives. Your question has been addressed in a handful of posts. Or, try the course and let us know what you think!