Apple M1 Ultra 's Advantages
Higher specification of memory (LPDDR5-6400 vs DDR5-5200)
Larger memory bandwidth (800GB/s vs 83.2GB/s)
Lower TDP (60W vs 170W)
AMD Ryzen 9 7900X 's Advantages
Released 6 months late
Higher base frequency (4.7GHz vs 3.2GHz)