Intel Celeron J1900 's Advantages
Higher base frequency (2.0GHz vs 1.8GHz)
Lower TDP (10W vs 35W)
Intel Core i5 12400T 's Advantages
Released 8 years and 2 months late
Higher specification of memory (4800 vs 1333)
Larger memory bandwidth (76.8GB/s vs 21.3GB/s)
Newer PCIe version (5 vs 2.0)
More modern manufacturing process (10nm vs 22nm)