Xeon E7 8850 's Advantages
Lower TDP (130W vs 210W)
Xeon w7 2555X 's Advantages
Released 13 years and 4 months late
Higher specification of memory (4800 vs 1333)
Higher base frequency (3.3GHz vs 2GHz)
Larger L3 cache size (33.75MB vs 24MB)
More modern manufacturing process (10nm vs 32nm)