MediaTek Dimensity 1080 Advantages
More modern manufacturing process (6nm vs 7nm)
Lower TDP (4W vs 6W)
Released 3 years and 10 months late
Qualcomm Snapdragon 855 Advantages
Better graphics card performance FLOPS (0.8985 TFLOPS vs 0.686 TFLOPS )
Higher Frequency (2840MHz vs 2600MHz)