Intel Core i9 13900HX 's Advantages
Newer PCIe version (5.0 vs 4.0)
Higher base frequency (2.2GHz vs 1.6GHz)
Larger L3 cache size (36MB vs 12MB)
Intel Core Ultra 5 135U 's Advantages
Released 11 months late
Better graphics card performance
Higher specification of memory (LPDDR5-7467 vs DDR5-5600)
Larger memory bandwidth (120GB/s vs 89.6GB/s)
More modern manufacturing process (7nm vs 10nm)
Lower TDP (12W vs 45W)