Xeon E5345 's Advantages
Higher specification of memory (DDR3
Depends on motherboard vs DDR3)
Higher base frequency (2.333GHz vs 2.3GHz)
Lower TDP (80W vs 120W)
Intel Xeon E5 2669 v3 's Advantages
Released 8 years and 2 months late
More modern manufacturing process (22nm vs 65nm)