My LG G Vista phone is equipped with a Qualcomm Cortex A7 1.2 GHz cpu and Adreno 305 GPU. My Insignia tablet has a Rockchip Cortex A9 1.6 GHz and Mali 400 GPU. Why does my phone runs smoother than the tablet even though it has a lower clocked and previous generation ARM cpu? Scrolling the screen is way smoother with the phone. Is the Qualcomm better manufactured than Rockchip?