Intel Xeon E3 1240 v3 's Advantages
Higher specification of memory (DDR3-1600 vs DDR3)
Higher base frequency (3.4GHz vs 1.9GHz)
Intel Xeon E3 1558L v5 's Advantages
Released 2 years and 11 months late
More modern manufacturing process (14nm vs 22nm)
Lower TDP (45W vs 80W)