Intel Core i5 1235U 's Advantages
Better graphics card performance
Higher specification of memory (5200 vs 4800)
Lower TDP (15W vs 65W)
Intel Core i5 13400 's Advantages
Released 11 months late
Newer PCIe version (5.0 vs 4.0)
Higher base frequency (2.5GHz vs 1.3GHz)
Larger L3 cache size (20MB vs 12MB)