Intel Core i7 9800X 's Advantages
Higher specification of memory (DDR4-2666 vs DDR4-2400)
Larger memory bandwidth (79.47GB/s vs 37.5GB/s)
Higher base frequency (3.8GHz vs 3.7GHz)
Larger L3 cache size (17MB vs 8MB)
Intel Core i3 9300 's Advantages
Released 6 months late
Integrated graphics card
Lower TDP (62W vs 165W)