Intel Core i5 9400 's Advantages
Lower TDP (65W vs 125W)
Intel Core Ultra 5 245K 's Advantages
Released 5 years and 9 months late
Better graphics card performance
Higher specification of memory (6400 vs 2666)
Larger memory bandwidth (102.4GB/s vs 41.6GB/s)
Newer PCIe version (5.0 vs 3.0)
Higher base frequency (4.2GHz vs 2.9GHz)
Larger L3 cache size (24MB vs 9MB)
More modern manufacturing process (3nm vs 14nm)