Intel Xeon E5 2628 v3 's Advantages
Released 2 years and 6 months late
Higher specification of memory (2133 vs 1600)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (85W vs 115W)
Intel Xeon E5 2689 's Advantages
Higher base frequency (2.6GHz vs 2.5GHz)