MediaTek Helio X30 Advantages
Larger memory bandwidth (27.81GB/s vs 17.07GB/s)
Higher Frequency (2600MHz vs 2200MHz)
Lower TDP (5W vs 6W)
MediaTek Dimensity 700 Advantages
Better graphics card performance FLOPS (0.243 TFLOPS vs 0.2176 TFLOPS )
More modern manufacturing process (7nm vs 10nm)
Released 3 years and 9 months late