Intel Xeon E3 1558L v5 's Advantages
Released 4 years late
Higher specification of memory (2133 vs 3)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 95W)
Intel Xeon E5 2450 's Advantages
Higher base frequency (2.1GHz vs 1.9GHz)
Larger L3 cache size (20MB vs 8MB)