Intel Xeon E5 1620 's Advantages
Higher base frequency (3.6GHz vs 2.4GHz)
Larger L3 cache size (10MB vs 8MB)
Intel Xeon E3 1268L v5 's Advantages
Released 3 years and 7 months late
Higher specification of memory (2133 vs 3)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (35W vs 130W)