Intel Xeon D 1557 's Advantages
Released 4 years and 10 months late
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 80W)
Intel Xeon E3 1230 's Advantages
Higher specification of memory (DDR3 vs DDR3)
Higher base frequency (3.2GHz vs 1.5GHz)
Larger L3 cache size (8MB vs 1.5MB)