Intel Xeon E5 2620 's Advantages
Lower TDP (95W vs 120W)
Intel Xeon E5 2669 v3 's Advantages
Released 2 years and 10 months late
Higher specification of memory (2133 vs 3)
Higher base frequency (2.3GHz vs 2GHz)
Larger L3 cache size (30MB vs 15MB)
More modern manufacturing process (22nm vs 32nm)