Intel Xeon D 1581 's Advantages
Released 1 years and 5 months late
More modern manufacturing process (14nm vs 22nm)
Lower TDP (65W vs 105W)
Intel Xeon E5 2663 v3 's Advantages
Higher specification of memory (2133 vs 4)
Higher base frequency (2.8GHz vs 1.8GHz)
Larger L3 cache size (25MB vs 1.5MB)