Intel Xeon E3 1275 v5 's Advantages
Higher base frequency (3.6GHz vs 2.4GHz)
Lower TDP (80W vs 225W)
Intel Xeon Platinum 8351N 's Advantages
Released 5 years and 6 months late
Higher specification of memory (2933 vs 2133)
Newer PCIe version (4 vs 3)
Larger L3 cache size (54MB vs 8MB)
More modern manufacturing process (10nm vs 14nm)