Intel Xeon E5 1660 's Advantages
Higher base frequency (3.3GHz vs 3.2GHz)
Larger L3 cache size (15MB vs 12MB)
Intel Xeon E 2356G 's Advantages
Released 9 years and 6 months late
Higher specification of memory (3200 vs 3)
Newer PCIe version (4 vs 3)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (80W vs 130W)