Xeon X5570 's Advantages
Higher specification of memory (1333 vs 3)
Higher base frequency (2.933GHz vs 2.7GHz)
Lower TDP (95W vs 130W)
Intel Xeon E5 4650 's Advantages
Released 3 years and 2 months late
Newer PCIe version (3 vs 2)
Larger L3 cache size (20MB vs 8MB)
More modern manufacturing process (32nm vs 45nm)