Intel Xeon E3 1285 v4 's Advantages
Released 9 months late
Higher base frequency (3.5GHz vs 2.3GHz)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (95W vs 105W)
Intel Xeon E5 2649 v3 's Advantages
Higher specification of memory (2133 vs 1866)
Larger L3 cache size (25MB vs 6MB)