Intel Xeon E5 2686 v3 's Advantages
Larger L3 cache size (45MB vs 8MB)
Intel Xeon E3 1505M v5 's Advantages
Released 1 years and 1 months late
Higher base frequency (2.8GHz vs 2GHz)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (45W vs 120W)