Xeon W 1390P 's Advantages
Released 9 years late
Higher specification of memory (DDR4-3200 vs DDR3)
Higher base frequency (3.5GHz vs 2GHz)
Larger L3 cache size (16MB vs 8MB)
More modern manufacturing process (14nm vs 32nm)
Intel Xeon E3 1125C 's Advantages
Lower TDP (40W vs 125W)