J.K. Shin: It doesn't matter which processor is running your Samsung Galaxy S4
Samsung Galaxy S III. But the octa-core Samsung Exynos 5 now does support LTE service and Shin said that the use of the two processors was a decision made because of supply and demand. The executive said, "We use multiple different sources. It's a sourcing issue."
So while the international version of the Samsung Galaxy S4 will feature the octa-core Samsung Exynos 5 and the U.S. and U.K. models will host the Qualcomm Snapdragon 600 processor, the differences will be too subtle to notice according to Shin.