Intel Xeon Gold 6421N 's Advantages
Released 7 years late
Higher specification of memory (DDR5-4400 vs DDR3)
Newer PCIe version (5 vs 3)
Larger L3 cache size (60MB vs 8MB)
More modern manufacturing process (10nm vs 14nm)
Intel Xeon E3 1575M v5 's Advantages
Higher base frequency (3GHz vs 1.8GHz)
Lower TDP (45W vs 185W)