Qualcomm Snapdragon 768G Advantages
More modern manufacturing process (7nm vs 10nm)
Lower TDP (5W vs 9W)
Released 2 years and 5 months late
Qualcomm Snapdragon 845 Advantages
Better graphics card performance FLOPS (0.727 TFLOPS vs 0.576 TFLOPS )
Larger memory bandwidth (29.8GB/s vs 17GB/s)