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 1.4GHz)
Lower TDP (15W vs 20W)
Intel Core Ultra 7 155H 's Advantages
Released 7 months late
Newer PCIe version (5.0 vs 4.0)
Larger L3 cache size (24MB vs 16MB)