MediaTek Helio X30 Advantages
Larger memory bandwidth (27.81GB/s vs 14.9GB/s)
Higher Frequency (2600MHz vs 2000MHz)
Lower TDP (5W vs 9W)
Qualcomm Snapdragon 670 Advantages
Better graphics card performance FLOPS (0.3584 TFLOPS vs 0.2176 TFLOPS )
Released 1 years and 6 months late