Intel Xeon E5 2669 v3 's Advantages
Higher base frequency (2.3GHz vs 1.9GHz)
Larger L3 cache size (30MB vs 8MB)
Intel Xeon E3 1558L v5 's Advantages
Released 1 years and 4 months late
More modern manufacturing process (14nm vs 22nm)
Lower TDP (45W vs 120W)