Xeon E6510 's Advantages
Higher base frequency (1.733GHz vs 1.1GHz)
Larger L3 cache size (12MB vs 4MB)
Intel Xeon E3 1220L v3 's Advantages
Released 3 years and 6 months late
Higher specification of memory (1600 vs 1333)
Newer PCIe version (3 vs 2)
More modern manufacturing process (22nm vs 45nm)
Lower TDP (13W vs 105W)