Intel Xeon E5 4640 's Advantages
Lower TDP (95W vs 130W)
Intel Xeon E5 2697 v2 's Advantages
Released 1 years and 4 months late
Higher base frequency (2.7GHz vs 2.4GHz)
Larger L3 cache size (30MB vs 20MB)
More modern manufacturing process (22nm vs 32nm)