Intel Xeon E3 1258L v4 's Advantages
Released 5 years and 3 months late
Newer PCIe version (3 vs 2)
Larger L3 cache size (6MB vs 4MB)
More modern manufacturing process (14nm vs 45nm)
Lower TDP (47W vs 80W)
Intel Xeon E5503 's Advantages
Higher base frequency (2GHz vs 1.8GHz)