AMD Ryzen 7 7840U's Advantages
Better graphics card performance
Higher specification of memory (LPDDR5x-7500 vs LPDDR5-7467)
Higher base frequency (3.3GHz vs 2.3GHz)
Lower TDP (15W vs 35W)
Intel Core Ultra 9 185H's Advantages
Released 7 months late
Newer PCIe version (5.0 vs 4.0)
Larger L3 cache size (24MB vs 16MB)