Xeon 6979P 's Advantages
Released 13 years and 5 months late
Higher specification of memory (8800 vs 1333)
Larger L3 cache size (504MB vs 30MB)
More modern manufacturing process (5nm vs 32nm)
Xeon E7 4870 's Advantages
Higher base frequency (2.4GHz vs 2.1GHz)
Lower TDP (130W vs 500W)