Intel Core i3 12100 's Advantages
Released 8 years and 2 months late
Better graphics card performance
Higher specification of memory (DDR5-4800 vs DDR3L-1333)
Larger memory bandwidth (76.8GB/s vs 21.3GB/s)
Newer PCIe version (5.0 vs 2.0)
Higher base frequency (3.3GHz vs 2.0GHz)
More modern manufacturing process (10nm vs 22nm)
Intel Celeron J1900 's Advantages
Lower TDP (10W vs 60W)