MediaTek Dimensity 920 Advantages
Lower TDP (4W vs 15W)
MediaTek Dimensity 9400 Advantages
Better graphics card performance FLOPS (4.9521 TFLOPS vs 0.684 TFLOPS )
Larger memory bandwidth (85.3GB/s vs 51.2GB/s)
Higher Frequency (3630MHz vs 2500MHz)
More modern manufacturing process (3nm vs 6nm)
Released 3 years and 2 months late