Pentium 1405 V2 's Advantages
Higher specification of memory (DDR3-1333 vs DDR3)
Larger L3 cache size (6MB vs 1.5MB)
Lower TDP (40W vs 45W)
Intel Xeon D 1557 's Advantages
Released 2 years and 1 months late
Higher base frequency (1.5GHz vs 1.4GHz)
More modern manufacturing process (14nm vs 22nm)