Samsung Exynos 7884B Advantages
Lower TDP (5W vs 8W)
Samsung Exynos 9611 Advantages
Better graphics card performance FLOPS (0.0918 TFLOPS vs 0.0493 TFLOPS )
Larger memory bandwidth (11.9GB/s vs 7.8GB/s)
Higher Frequency (2300MHz vs 1560MHz)
More modern manufacturing process (10nm vs 14nm)