Samsung ATIV Book 6 vs ATIV Book 8

Anyone have any information about the differences between the 2. ATIV Book 6 is already out and ATIV Book 8 is about to be released any day in the US. The ATIV Book 8 is the Series 7 Chronos that was shown at CES 2013 with Core i7 and 2GB Radeon 8870 GPU. All I can really see that is different is the GPU.