Intel Xeon E3 1558L v5 's Advantages
Released 4 years and 2 months late
Higher specification of memory (2133 vs 3)
Higher base frequency (1.9GHz vs 1.8GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 80W)
Intel Xeon E5 2603 's Advantages
Larger L3 cache size (10MB vs 8MB)