Apple M4 iPad Advantages
Better graphics card performance FLOPS (4.09 TFLOPS vs 2.918 TFLOPS )
Larger memory bandwidth (120GB/s vs 102.4GB/s)
Higher Frequency (4400MHz vs 3490MHz)
More modern manufacturing process (3nm vs 5nm)
Released 1 years and 11 months late
Apple M2 iPad Advantages
Lower TDP (15W vs 20W)