MediaTek Helio X20 Advantages
Lower TDP (5W vs 10W)
MediaTek Dimensity 800U Advantages
Better graphics card performance FLOPS (0.3264 TFLOPS vs 0.0998 TFLOPS )
Larger memory bandwidth (17.07GB/s vs 12.8GB/s)
Higher Frequency (2400MHz vs 2100MHz)
More modern manufacturing process (7nm vs 20nm)
Released 5 years and 3 months late