Intel Xeon E5 1620 's Advantages
Higher base frequency (3.6GHz vs 2.9GHz)
Larger L3 cache size (10MB vs 8.25MB)
Intel Xeon W 2102 's Advantages
Released 5 years and 5 months late
Higher specification of memory (2666 vs 3)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (120W vs 130W)