Intel Xeon E3 1545M v5 's Advantages
Released 1 years and 2 months late
More modern manufacturing process (14nm vs 22nm)
Lower TDP (45W vs 135W)
Intel Xeon E5 2666 v3 's Advantages
Higher specification of memory (2133 vs 2133)
Larger L3 cache size (25MB vs 8MB)