Intel Core i3 4170 's Advantages
Higher base frequency (3.7GHz vs 3.6GHz)
Lower TDP (54W vs 95W)
Intel Core i9 9900K 's Advantages
Released 3 years and 7 months late
Higher specification of memory (DDR4-2666 vs DDR3-1600)
Larger memory bandwidth (41.6GB/s vs 25.6GB/s)
Larger L3 cache size (16MB vs 3MB)
More modern manufacturing process (14nm vs 22nm)