Xeon E7 8860 's Advantages
Higher base frequency (2.266GHz vs 1.8GHz)
Lower TDP (130W vs 185W)
Intel Xeon Gold 6421N 's Advantages
Released 11 years and 9 months late
Higher specification of memory (4400 vs 1333)
Larger L3 cache size (60MB vs 24MB)
More modern manufacturing process (10nm vs 32nm)