Xeon E5530 's Advantages
Higher specification of memory (1066 vs 3)
Lower TDP (80W vs 130W)
Intel Xeon W3670 's Advantages
Released 1 years and 5 months late
Higher base frequency (3.2GHz vs 2.4GHz)
Larger L3 cache size (12MB vs 8MB)
More modern manufacturing process (32nm vs 45nm)