Intel Xeon E3 1585 v5 's Advantages
Higher base frequency (3.5GHz vs 3.2GHz)
Lower TDP (65W vs 165W)
Intel Xeon Gold 5515 's Advantages
Released 7 years and 7 months late
Higher specification of memory (4800 vs 2133)
Newer PCIe version (5 vs 3)
Larger L3 cache size (22.5MB vs 8MB)
More modern manufacturing process (10nm vs 14nm)