Intel Xeon E5 4620 v3 's Advantages
Larger L3 cache size (25MB vs 8MB)
Intel Xeon E3 1515M v5 's Advantages
Released 7 months late
Higher specification of memory (2133 vs 1866)
Higher base frequency (2.8GHz vs 2GHz)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (45W vs 105W)