Intel Xeon E3 1220L 's Advantages
Higher base frequency (2.2GHz vs 2GHz)
Lower TDP (20W vs 95W)
Intel Xeon E5 2640 v2 's Advantages
Released 2 years and 5 months late
Larger L3 cache size (20MB vs 3MB)
More modern manufacturing process (22nm vs 32nm)