Intel Xeon E5 2689 's Advantages
Released 5 years and 10 months late
Higher specification of memory (DDR3-1600 vs DDR3
Depends on motherboard)
More modern manufacturing process (32nm vs 65nm)
Lower TDP (115W vs 130W)
Xeon 5080 's Advantages
Higher base frequency (3.73GHz vs 2.6GHz)