Intel Core i3 14100 's Advantages
Released 2 years late
Integrated graphics card
Higher base frequency (3.5GHz vs 2.4GHz)
Lower TDP (60W vs 65W)
Intel Core i9 12900 's Advantages
Higher specification of memory (DDR5-4800 vs DDR5-4800)
Newer PCIe version (5 vs 5.0)
Larger L3 cache size (30MB vs 12MB)