Intel Core i7 8665U 's Advantages
Lower TDP (15W vs 55W)
Intel Core i5 14500HX 's Advantages
Released 4 years and 9 months late
Better graphics card performance
Higher specification of memory (5600 vs 2400)
Larger memory bandwidth (89.6GB/s vs 37.5GB/s)
Newer PCIe version (5.0 vs 3.0)
Higher base frequency (2.6GHz vs 1.9GHz)
Larger L3 cache size (24MB vs 8MB)
More modern manufacturing process (10nm vs 14nm)