Intel Xeon E3 1220 v5 's Advantages
Released 3 years and 5 months late
More modern manufacturing process (14nm vs 22nm)
Intel Xeon E3 1280 v2 's Advantages
Higher specification of memory (DDR3 vs DDR3)
Higher base frequency (3.6GHz vs 3GHz)
Lower TDP (69W vs 80W)