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)
Intel Xeon E5 2669 v3 's Advantages
Higher base frequency (2.3GHz vs 1.9GHz)
Larger L3 cache size (30MB vs 8MB)