Intel Xeon E5 2697 v3 's Advantages
Higher specification of memory (2133 vs 4)
Higher base frequency (2.6GHz vs 2.2GHz)
Larger L3 cache size (35MB vs 1.5MB)
Intel Xeon D 1520 's Advantages
Released 6 months late
More modern manufacturing process (14nm vs 22nm)
Lower TDP (45W vs 145W)