AMD Ryzen 3 4100 's Advantages
Released 4 years and 6 months late
Higher specification of memory (DDR4-3200 vs DDR4-2666)
Higher base frequency (3.8GHz vs 2.8GHz)
Intel Core i5 8400 's Advantages
Integrated graphics card
Newer PCIe version (3.0 vs 3)
Larger L3 cache size (9MB vs 4MB)