Intel Core i9 9900X's Advantages
Higher base frequency (3.5GHz vs 3.2GHz)
Apple M1 Ultra's Advantages
Released 3 years and 5 months late
Integrated graphics card
Higher specification of memory (LPDDR5-6400 vs DDR4-2666)
Larger memory bandwidth (800GB/s vs 85GB/s)
Lower TDP (60W vs 165W)