AMD Ryzen 7 7840HS 's Advantages
Higher specification of memory (7500 vs 7467)
Higher base frequency (3.8GHz vs 1.4GHz)
More modern manufacturing process (4nm vs 7nm)
Lower TDP (54W vs 65W)
Intel Core Ultra 7 155H 's Advantages
Released 8 months late
Better graphics card performance
Larger memory bandwidth (120GB/s vs 89.6GB/s)
Newer PCIe version (5.0 vs 4.0)
Larger L3 cache size (24MB vs 16MB)