Intel Xeon E5 2680 's Advantages
Higher base frequency (2.7GHz vs 2.1GHz)
Larger L3 cache size (20MB vs 1.5MB)
Intel Xeon D 1567 's Advantages
Released 3 years and 11 months late
Higher specification of memory (DDR3 vs DDR3)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (65W vs 130W)