Which 1 is better - 1)Exynos 5260 ; Quad-core 1.3 GHz Cortex A7 & dual-core 1.7 GHz Cortex A15 with 2 GB RAM OR 2)Qualcomm MSM8928 Snapdragon 400 ; Quad-core 1.6 GHz Cortex-A7 with 1.5GB RAM??