Exynos-driven Galaxy S7 is slower than its Snapdragon-powered sibling
As already mentioned by multiple rumors, the Samsung Galaxy S7 flagship comes in two different versions. Depending on the area where is sold, this flagship is powered by the Snapdragon 820 processor or by Samsung's Exynos 8 Octa 8890 chip. While the main cores have similar performance, the GPU of the Exynos SoC is much slower than the one of the Qualcomm chipset.
The main reason for selling two different versions of the Galaxy S7 is that the Qualcomm chip supports CDMA and so it ends up in the US and China, while the rest of the world gets the Exynos 8890, a chipset without CDMA support. The Snapdragon 820 uses the Adreno 530 graphics adapter, while its counterpart uses the Mali-T880 MP12.
In practice, AnTuTu shows that the Snapdragon-powered Galaxy S7 simply crushes the Exynos-driven one, their benchmark scores saying it all - 55098 vs. 37545. On the other hand, the chip performance benchmark brings them closer, with 136383 vs. 129865. In both cases mentioned here, the Apple A9 SoC fits in between the two chips powering the Galaxy S7.