Intel Xeon E5 1660 v2 's Advantages
Higher base frequency (3.7GHz vs 3.6GHz)
Larger L3 cache size (15MB vs 8.25MB)
Intel Xeon W 2123 's Advantages
Released 3 years and 11 months late
Higher specification of memory (2666 vs 1866)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (120W vs 130W)