Intel Xeon E5 2699 v3 's Advantages
Higher specification of memory (DDR4-2133 vs DDR3-1866)
Larger L3 cache size (45MB vs 6MB)
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 145W)