Intel Xeon E3 1280 v3 's Advantages
Higher base frequency (3.6GHz vs 2.9GHz)
Intel Xeon E3 1535M v5 's Advantages
Released 2 years and 4 months late
Higher specification of memory (2133 vs 4)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (45W vs 82W)