Intel Xeon E3 1220 v3 's Advantages
Higher base frequency (3.1GHz vs 1.9GHz)
Intel Xeon E3 1558L v5 's Advantages
Released 2 years and 11 months late
Higher specification of memory (2133 vs 1600)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (45W vs 80W)