Intel Xeon E5 1603 v3 's Advantages
Lower TDP (140W vs 165W)
Intel Xeon Gold 5515 's Advantages
Released 9 years and 3 months late
Higher specification of memory (4800 vs 1866)
Newer PCIe version (5 vs 3)
Higher base frequency (3.2GHz vs 2.8GHz)
Larger L3 cache size (22.5MB vs 10MB)
More modern manufacturing process (10nm vs 22nm)