Intel Core i3 1215U 's Advantages
Better graphics card performance
Higher specification of memory (LPDDR5-5200 vs DDR5-4800)
Lower TDP (15W vs 60W)
Intel Core i3 12100 's Advantages
Newer PCIe version (5.0 vs 4.0)
Higher base frequency (3.3GHz vs 1.2GHz)
Larger L3 cache size (12MB vs 10MB)