Intel Core i3 7100U 's Advantages
Higher base frequency (2.4GHz vs 1.7GHz)
Intel Core Ultra 7 155U 's Advantages
Released 7 years and 4 months late
Better graphics card performance
Higher specification of memory (LPDDR5-7467 vs DDR4-2133)
Larger memory bandwidth (120GB/s vs 34.1GB/s)
Newer PCIe version (4.0 vs 3.0)
Larger L3 cache size (12MB vs 3MB)
More modern manufacturing process (7nm vs 14nm)
Lower TDP (12W vs 15W)