AMD Ryzen 7 5700's Advantages
Released 2 years and 9 months late
Larger memory bandwidth (51.2GB/s vs 47.68GB/s)
Lower TDP (65W vs 105W)
AMD Ryzen 7 3800X's Advantages
Newer PCIe version (4.0 vs 3)
Higher base frequency (3.9GHz vs 3.7GHz)
Larger L3 cache size (32MB vs 16MB)