Intel Xeon E3 1558L v5 's Advantages
Released 5 years and 3 months late
Higher specification of memory (2133 vs 3)
Newer PCIe version (3 vs 2)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 130W)
Intel Xeon W3690 's Advantages
Higher base frequency (3.466GHz vs 1.9GHz)
Larger L3 cache size (12MB vs 8MB)