AMD Threadripper PRO 7955WX 's Advantages
Larger memory bandwidth (332.8GB/s vs 83.2GB/s)
Newer PCIe version (5 vs 4.0)
Higher base frequency (4.5GHz vs 4.2GHz)
Larger L3 cache size (64MB vs 16MB)
AMD Ryzen 5 8400F 's Advantages
Released 7 months late
More modern manufacturing process (4nm vs 5nm)
Lower TDP (65W vs 350W)