AMD Ryzen 7 3700X 's Advantages
Higher base frequency (3.6GHz vs 3.3GHz)
Lower TDP (65W vs 105W)
AMD Ryzen 5 5600X3D 's Advantages
Released 4 years late
Larger memory bandwidth (51.2GB/s vs 47.68GB/s)
Newer PCIe version (4 vs 4.0)
Larger L3 cache size (96MB vs 32MB)