Intel Xeon E3 1226 v3 's Advantages
Released 2 years and 2 months late
Higher specification of memory (DDR3-1600 vs DDR3)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (84W vs 130W)
Intel Xeon E5 2643 's Advantages
Larger L3 cache size (10MB vs 8MB)