Intel Core i5 8279U 's Advantages
Better graphics card performance
Higher base frequency (2.4GHz vs 2.2GHz)
Lower TDP (28W vs 45W)
Intel Core i9 13900HX 's Advantages
Released 3 years and 8 months late
Higher specification of memory (DDR5-5600 vs DDR4-2400)
Larger memory bandwidth (89.6GB/s vs 37.5GB/s)
Newer PCIe version (5.0 vs 3.0)
Larger L3 cache size (36MB vs 6MB)
More modern manufacturing process (10nm vs 14nm)