MediaTek Dimensity 900 's Advantages
Lower TDP (4W vs 15W)
MediaTek Dimensity 9400 's Advantages
Better graphics card performance FLOPS (4.9521 TFLOPS vs 0.621 TFLOPS )
Larger memory bandwidth (85.3GB/s vs 18.4GB/s)
Higher Frequency (3630MHz vs 2400MHz)
More modern manufacturing process (3nm vs 6nm)
Released 3 years and 5 months late