Intel Xeon E3 1220L v3 's Advantages
Released 3 years and 6 months late
Higher specification of memory (1600 vs 3)
Newer PCIe version (3 vs 2)
More modern manufacturing process (22nm vs 45nm)
Lower TDP (13W vs 80W)
Intel Xeon E5503 's Advantages
Higher base frequency (2GHz vs 1.1GHz)