Intel Xeon E5606 's Advantages
Higher base frequency (2.133GHz vs 2.1GHz)
Lower TDP (80W vs 120W)
AMD EPYC 7251 's Advantages
Released 6 years and 4 months late
Higher specification of memory (DDR4-2400 vs DDR3)
Newer PCIe version (3 vs 2)
Larger L3 cache size (32MB vs 8MB)