Intel Xeon E3 1285 v4 's Advantages
Released 3 years and 3 months late
Higher specification of memory (1866 vs 3)
Higher base frequency (3.5GHz vs 3.3GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (95W vs 130W)
Intel Xeon E5 1660 's Advantages
Larger L3 cache size (15MB vs 6MB)