Apple M2's Advantages
Lower TDP (15W vs 20W)
Apple M4's Advantages
Released 1 years and 11 months late
Better graphics card performance
Higher specification of memory (LPDDR5X-7500 vs LPDDR5-6400)
Larger memory bandwidth (120GB/s vs 102.4GB/s)
Higher base frequency (4.05GHz vs 3.5GHz)
More modern manufacturing process (3nm vs 5nm)