Intel Xeon D 1581 's Advantages
Released 3 years and 9 months late
More modern manufacturing process (14nm vs 22nm)
Intel Xeon E3 1220L v2 's Advantages
Higher specification of memory (DDR3 vs DDR3)
Higher base frequency (2.3GHz vs 1.8GHz)
Larger L3 cache size (8MB vs 1.5MB)
Lower TDP (17W vs 65W)