MediaTek Helio G90T Advantages
Lower TDP (5W vs 6W)
Released 7 months late
Qualcomm Snapdragon 855 Advantages
Better graphics card performance FLOPS (0.8985 TFLOPS vs 0.2304 TFLOPS )
Higher Frequency (2840MHz vs 2050MHz)
More modern manufacturing process (7nm vs 12nm)