Are the i5/i7 CPUs for the Surface Pro 4 the same as the i5/i7 CPUs in the Surface Book? I know the Surface Book has a discrete GPU for most versions, but is the CPU the same model for each? They are both Skylake processors, but there are different versions of mobile i5/i7. One person told me Surface Book utilizes the -H version, and someone else told me they both use the -U version.