Xeon E5530 's Advantages
Higher specification of memory (1066 vs 3)
Higher base frequency (2.4GHz vs 2.2GHz)
Intel Xeon E5 2420 v2 's Advantages
Released 4 years and 6 months late
Larger L3 cache size (15MB vs 8MB)
More modern manufacturing process (22nm vs 45nm)