Xeon X5570 's Advantages
Higher base frequency (2.933GHz vs 1.7GHz)
Lower TDP (95W vs 105W)
Intel Xeon E5 4648 v3 's Advantages
Released 6 years and 3 months late
Higher specification of memory (1866 vs 1333)
Newer PCIe version (3 vs 2)
Larger L3 cache size (30MB vs 8MB)
More modern manufacturing process (22nm vs 45nm)