MediaTek Helio P90 Advantages
Better graphics card performance FLOPS (0.1552 TFLOPS vs 0.0576 TFLOPS )
Larger memory bandwidth (13.91GB/s vs 12.8GB/s)
More modern manufacturing process (12nm vs 16nm)
Released 2 years and 9 months late
MediaTek Helio P20 Advantages
Higher Frequency (2300MHz vs 2200MHz)