Intel Xeon E5 2689 's Advantages
Lower TDP (115W vs 185W)
Intel Xeon Gold 6326 's Advantages
Released 9 years and 1 months late
Higher specification of memory (DDR4-3200 vs DDR3-1600)
Newer PCIe version (4 vs 3)
Higher base frequency (2.9GHz vs 2.6GHz)
Larger L3 cache size (24MB vs 20MB)
More modern manufacturing process (10nm vs 32nm)