Intel Xeon E5 2640 v3 's Advantages
Higher specification of memory (DDR4-1866 vs DDR3-1866)
Larger L3 cache size (20MB vs 6MB)
Lower TDP (90W vs 95W)
Intel Xeon E3 1285 v4 's Advantages
Released 9 months late
Higher base frequency (3.5GHz vs 2.6GHz)
More modern manufacturing process (14nm vs 22nm)