Intel Xeon E5503 's Advantages
Lower TDP (80W vs 95W)
Intel Xeon E3 1235 's Advantages
Released 1 years and 1 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3.2GHz vs 2GHz)
Larger L3 cache size (8MB vs 4MB)
More modern manufacturing process (32nm vs 45nm)