Qualcomm Snapdragon 860 Advantages
Higher Frequency (2960MHz vs 2730MHz)
Lower TDP (6W vs 9W)
Samsung Exynos 990 Advantages
Better graphics card performance FLOPS (1.126 TFLOPS vs 1.0368 TFLOPS )
Larger memory bandwidth (44GB/s vs 34.13GB/s)
Released 6 months late