Intel Xeon E3 1275 's Advantages
Higher base frequency (3.4GHz vs 2.1GHz)
Lower TDP (95W vs 120W)
AMD EPYC 7251 's Advantages
Released 6 years and 2 months late
Higher specification of memory (2400 vs 3)
Larger L3 cache size (32MB vs 8MB)
More modern manufacturing process (14nm vs 32nm)