Intel Xeon E3 1220 v2 's Advantages
Lower TDP (69W vs 80W)
Intel Xeon E 2356G 's Advantages
Released 9 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 3.1GHz)
Larger L3 cache size (12MB vs 8MB)
More modern manufacturing process (14nm vs 22nm)