Xeon E7 2870 's Advantages
Larger L3 cache size (30MB vs 8.25MB)
Intel Xeon W 2102 's Advantages
Released 6 years and 4 months late
Higher specification of memory (2666 vs 1333)
Higher base frequency (2.9GHz vs 2.4GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (120W vs 130W)