Qualcomm Snapdragon 780G Advantages
More modern manufacturing process (5nm vs 7nm)
Released 1 years and 3 months late
Qualcomm Snapdragon 865 Advantages
Better graphics card performance FLOPS (1.2021 TFLOPS vs 0.7526 TFLOPS )
Larger memory bandwidth (44GB/s vs 17GB/s)
Higher Frequency (2840MHz vs 2400MHz)