Intel Xeon E3 1290 v2 's Advantages
Released 2 years and 2 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3.7GHz vs 2GHz)
Larger L3 cache size (8MB vs 4MB)
More modern manufacturing process (22nm vs 45nm)
Intel Xeon E5503 's Advantages
Lower TDP (80W vs 87W)