Intel Xeon E3 1585 v5 's Advantages
Released 4 years late
Higher specification of memory (2133 vs 3)
Higher base frequency (3.5GHz vs 1.9GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (65W vs 95W)
Intel Xeon E5 2420 's Advantages
Larger L3 cache size (15MB vs 8MB)