Samsung Exynos 7872 Advantages
Lower TDP (5W vs 9W)
Samsung Exynos 990 Advantages
Better graphics card performance FLOPS (1.126 TFLOPS vs 0.0384 TFLOPS )
Larger memory bandwidth (44GB/s vs 3.7GB/s)
Higher Frequency (2730MHz vs 2000MHz)
More modern manufacturing process (7nm vs 14nm)
Released 1 years and 9 months late