Intel Core i3 9350KF 's Advantages
Higher base frequency (4.0GHz vs 3.2GHz)
Lower TDP (91W vs 125W)
Intel Core i9 12900KF 's Advantages
Released 2 years and 9 months late
Higher specification of memory (4800 vs 2400)
Larger memory bandwidth (76.8GB/s vs 37.5GB/s)
Newer PCIe version (5.0 vs 3.0)
Larger L3 cache size (30MB vs 8MB)
More modern manufacturing process (10nm vs 14nm)