Intel Xeon E3 1285 v6 's Advantages
Released 5 years and 5 months late
Higher specification of memory (4 vs 3)
Higher base frequency (4.1GHz vs 2.4GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (79W vs 115W)
Intel Xeon E5 2665 's Advantages
Larger L3 cache size (20MB vs 8MB)