Intel Xeon E5 2689 's Advantages
Higher base frequency (2.6GHz vs 2GHz)
Lower TDP (115W vs 135W)
Intel Xeon E5 2698B v3 's Advantages
Released 2 years and 10 months late
Higher specification of memory (DDR4-2133 vs DDR3-1600)
Larger L3 cache size (40MB vs 20MB)
More modern manufacturing process (22nm vs 32nm)