Qualcomm Snapdragon 730 Advantages
More modern manufacturing process (8nm vs 10nm)
Lower TDP (5W vs 9W)
Released 1 years and 4 months late
Qualcomm Snapdragon 845 Advantages
Better graphics card performance FLOPS (0.727 TFLOPS vs 0.3584 TFLOPS )
Larger memory bandwidth (29.8GB/s vs 14.9GB/s)
Higher Frequency (2800MHz vs 2200MHz)