MediaTek Helio G99 Advantages
Better graphics card performance FLOPS (0.2816 TFLOPS vs 0.2176 TFLOPS )
More modern manufacturing process (6nm vs 10nm)
Released 5 years and 3 months late
MediaTek Helio X30 Advantages
Larger memory bandwidth (27.81GB/s vs 17.1GB/s)
Higher Frequency (2600MHz vs 2200MHz)