Xeon E5345 's Advantages
Higher specification of memory (DDR3
Depends on motherboard vs DDR3)
Lower TDP (80W vs 130W)
Intel Xeon E5 2667 v2 's Advantages
Released 6 years and 10 months late
Higher base frequency (3.3GHz vs 2.333GHz)
More modern manufacturing process (22nm vs 65nm)