Xeon E 2134 's Advantages
Released 4 years and 10 months late
Higher specification of memory (2666 vs 1866)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (71W vs 130W)
Intel Xeon E5 1660 v2 's Advantages
Higher base frequency (3.7GHz vs 3.5GHz)
Larger L3 cache size (15MB vs 8MB)