Samsung Exynos 7880 Advantages
Lower TDP (4W vs 5W)
Released 1 years and 2 months late
Samsung Exynos 8890 Advantages
Better graphics card performance FLOPS (0.2496 TFLOPS vs 0.0912 TFLOPS )
Larger memory bandwidth (26.82GB/s vs 12.8GB/s)
Higher Frequency (2300MHz vs 1900MHz)