Intel Xeon E3 1558L v5 's Advantages
Released 6 years and 2 months late
Higher specification of memory (2133 vs 1333)
Newer PCIe version (3 vs 2)
More modern manufacturing process (14nm vs 45nm)
Lower TDP (45W vs 105W)
Xeon E7540 's Advantages
Higher base frequency (2GHz vs 1.9GHz)
Larger L3 cache size (18MB vs 8MB)