Intel Xeon E5 2643 v3 's Advantages
Larger L3 cache size (20MB vs 11MB)
Lower TDP (135W vs 140W)
Intel Xeon W 2145 's Advantages
Released 2 years and 11 months late
Higher specification of memory (DDR4-2666 vs DDR4-2133)
Higher base frequency (3.7GHz vs 3.4GHz)
More modern manufacturing process (14nm vs 22nm)