Intel Core i3 7100U 's Advantages
Lower TDP (15W vs 55W)
Intel Core Ultra 7 255HX 's Advantages
Released 8 years and 5 months late
Higher specification of memory (6400 vs 2133)
Larger memory bandwidth (102.4GB/s vs 34.1GB/s)
Newer PCIe version (5 vs 3.0)
Larger L3 cache size (24MB vs 3MB)
More modern manufacturing process (3nm vs 14nm)