Intel Core i3 12100's Advantages
Released 2 years and 9 months late
Higher specification of memory (DDR5-4800 vs DDR4-2400)
Larger memory bandwidth (76.8GB/s vs 37.5GB/s)
Newer PCIe version (5.0 vs 3.0)
Larger L3 cache size (12MB vs 8MB)
More modern manufacturing process (10nm vs 14nm)
Lower TDP (60W vs 91W)
Intel Core i3 9350K's Advantages
Better graphics card performance
Higher base frequency (4.0GHz vs 3.3GHz)