Xeon E7 2820 's Advantages
Lower TDP (105W vs 270W)
Intel Xeon w5 3425 's Advantages
Released 11 years and 10 months late
Higher specification of memory (4800 vs 1333)
Higher base frequency (3.2GHz vs 2GHz)
Larger L3 cache size (30MB vs 18MB)
More modern manufacturing process (10nm vs 32nm)