Intel Xeon E3 1558L v5 's Advantages
Lower TDP (45W vs 80W)
Intel Xeon E 2356G 's Advantages
Released 5 years and 4 months late
Higher specification of memory (DDR4-3200 vs DDR3)
Newer PCIe version (4 vs 3)
Higher base frequency (3.2GHz vs 1.9GHz)
Larger L3 cache size (12MB vs 8MB)