Samsung Exynos 990 Advantages
Better graphics card performance FLOPS (1.126 TFLOPS vs 0.4093 TFLOPS )
Larger memory bandwidth (44GB/s vs 34.1GB/s)
Higher Frequency (2730MHz vs 2390MHz)
More modern manufacturing process (7nm vs 10nm)
Released 2 years and 1 months late
Apple A11 Bionic Advantages
Lower TDP (8W vs 9W)