Intel Xeon E3 1226 v3 's Advantages
Higher base frequency (3.3GHz vs 2.5GHz)
Lower TDP (84W vs 270W)
Intel Xeon w7 3455 's Advantages
Released 8 years and 9 months late
Higher specification of memory (4800 vs 1600)
Newer PCIe version (5 vs 3)
Larger L3 cache size (67.5MB vs 8MB)
More modern manufacturing process (10nm vs 22nm)