Xeon E7 2870 's Advantages
Higher base frequency (2.4GHz vs 2.1GHz)
Larger L3 cache size (30MB vs 24MB)
Intel Xeon W 11955M 's Advantages
Released 10 years and 1 months late
Higher specification of memory (3200 vs 1333)
More modern manufacturing process (10nm vs 32nm)
Lower TDP (35W vs 130W)