Qualcomm Snapdragon 662 Advantages
Lower TDP (4W vs 5W)
Qualcomm Snapdragon 778G Plus Advantages
Better graphics card performance FLOPS (0.8448 TFLOPS vs 0.2432 TFLOPS )
Larger memory bandwidth (25.6GB/s vs 13.9GB/s)
Higher Frequency (2500MHz vs 2000MHz)
More modern manufacturing process (6nm vs 11nm)
Released 1 years and 9 months late