Intel Xeon E5 4648 v3 's Advantages
Higher specification of memory (DDR4-1866 vs DDR4)
Larger L3 cache size (30MB vs 8MB)
Intel Xeon E3 1285 v6 's Advantages
Released 2 years and 2 months late
Higher base frequency (4.1GHz vs 1.7GHz)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (79W vs 105W)