Xeon E7 2820 's Advantages
Lower TDP (105W vs 400W)
Xeon 6952P 's Advantages
Released 13 years and 5 months late
Higher specification of memory (8800 vs 1333)
Higher base frequency (2.1GHz vs 2GHz)
Larger L3 cache size (480MB vs 18MB)
More modern manufacturing process (5nm vs 32nm)