Qualcomm Snapdragon 439 Advantages
Lower TDP (5W vs 10W)
Qualcomm Snapdragon 888 Advantages
Better graphics card performance FLOPS (1.72 TFLOPS vs 0.0432 TFLOPS )
Larger memory bandwidth (51.2GB/s vs 6.4GB/s)
Higher Frequency (2840MHz vs 2000MHz)
More modern manufacturing process (5nm vs 12nm)
Released 2 years and 6 months late