Intel Xeon E5 2620 's Advantages
Lower TDP (95W vs 105W)
Intel Xeon E5 2658A v3 's Advantages
Released 2 years and 10 months late
Higher specification of memory (2133 vs 3)
Higher base frequency (2.2GHz vs 2GHz)
Larger L3 cache size (30MB vs 15MB)
More modern manufacturing process (22nm vs 32nm)