Intel Xeon E5649 's Advantages
Lower TDP (80W vs 350W)
Intel Xeon Gold 6458Q 's Advantages
Released 11 years and 11 months late
Higher specification of memory (4800 vs 3)
Newer PCIe version (5 vs 2)
Higher base frequency (3.1GHz vs 2.533GHz)
Larger L3 cache size (60MB vs 12MB)
More modern manufacturing process (10nm vs 32nm)