Intel Xeon E5 1691 v3 's Advantages
Higher base frequency (2.5GHz vs 2.1GHz)
Larger L3 cache size (35MB vs 32MB)
AMD EPYC 7251 's Advantages
Released 2 years and 9 months late
Higher specification of memory (DDR4-2400 vs DDR4-2133)
Lower TDP (120W vs 135W)