Intel Xeon E3 1220L v2 's Advantages
Lower TDP (17W vs 45W)
Intel Xeon E3 1535M v5 's Advantages
Released 3 years and 5 months late
Higher specification of memory (2133 vs 3)
Higher base frequency (2.9GHz vs 2.3GHz)
More modern manufacturing process (14nm vs 22nm)