Intel Xeon D 1571 's Advantages
Released 2 years and 5 months late
More modern manufacturing process (14nm vs 22nm)
Lower TDP (45W vs 130W)
Intel Xeon E5 1660 v2 's Advantages
Higher specification of memory (1866 vs 4)
Higher base frequency (3.7GHz vs 1.3GHz)
Larger L3 cache size (15MB vs 1.5MB)