Intel Core i5 1240U 's Advantages
Larger L3 cache size (12MB vs 10MB)
Lower TDP (9W vs 15W)
Intel Core i3 1215U 's Advantages
Better graphics card performance
Higher specification of memory (LPDDR5-5200 vs LPDDR5-5200)
Higher base frequency (1.2GHz vs 1.1GHz)