MediaTek Helio X20 Advantages
Better graphics card performance FLOPS (0.0998 TFLOPS vs 0.0435 TFLOPS )
MediaTek Helio G37 Advantages
Larger memory bandwidth (13.9GB/s vs 12.8GB/s)
Higher Frequency (2300MHz vs 2100MHz)
More modern manufacturing process (12nm vs 20nm)
Lower TDP (2.2W vs 5W)
Released 5 years and 1 months late