Intel Xeon E3 1265L v3 's Advantages
Lower TDP (45W vs 120W)
Intel Xeon W 2140B 's Advantages
Released 4 years and 6 months late
Higher specification of memory (DDR4-2666 vs DDR3)
Higher base frequency (3.2GHz vs 2.5GHz)
Larger L3 cache size (11MB vs 8MB)
More modern manufacturing process (14nm vs 22nm)