AMD Ryzen Threadripper 2990WX's Advantages
Higher base frequency (3.0GHz vs 2.7GHz)
Lower TDP (250W vs 280W)
AMD Ryzen Threadripper Pro 3995WX's Advantages
Released 1 years and 11 months late
Higher specification of memory (DDR4-3200 vs DDR4-2933)
Larger memory bandwidth (204.8GB/s vs 87.42GB/s)
Newer PCIe version (4.0 vs 3.0)
Larger L3 cache size (256MB vs 64MB)
More modern manufacturing process (7nm vs 12nm)