Intel Core i3 9300 's Advantages
Integrated graphics card
Lower TDP (62W vs 165W)
Intel Core i9 10900X 's Advantages
Released 6 months late
Higher specification of memory (2933 vs 2400)
Larger memory bandwidth (93.8GB/s vs 37.5GB/s)
Larger L3 cache size (20MB vs 8MB)