Intel Xeon E3 1280 v2 's Advantages
Higher base frequency (3.6GHz vs 3.5GHz)
Larger L3 cache size (8MB vs 6MB)
Lower TDP (69W vs 95W)
Intel Xeon E3 1285 v4 's Advantages
Released 3 years and 1 months late
Higher specification of memory (1866 vs 3)
More modern manufacturing process (14nm vs 22nm)