AMD Ryzen 5 1500X 's Advantages
Higher base frequency (3.5GHz vs 3.4GHz)
Lower TDP (65W vs 105W)
AMD Ryzen 9 5950X 's Advantages
Released 3 years and 6 months late
Higher specification of memory (DDR4-3200 vs DDR4-2666)
Larger memory bandwidth (47.68GB/s vs 39.74GB/s)
Newer PCIe version (4.0 vs 3.0)
Larger L3 cache size (64MB vs 16MB)