Intel Xeon E3 1220 's Advantages
Lower TDP (80W vs 350W)
AMD Threadripper PRO 7975WX 's Advantages
Released 12 years and 6 months late
Higher specification of memory (DDR5-5200 vs DDR3)
Newer PCIe version (5 vs 3)
Higher base frequency (4GHz vs 3.1GHz)
Larger L3 cache size (128MB vs 8MB)