This is in the tech section, so I will go into an admittedly more arcane detail of processor characteristics.
The AMD 6272 is a 16 core processor, the E5-2620 is a 6 core processor. It depends on the host OS/Kernel, but most high-performance virtualization solutions are configured around a per-core/per-vcpu allocation. In that environment, more cores allocated or available is going to generate the best end-result.
As a reviewer said @ NewEgg, "...this will not help you run internet explorer or computer games. It will help you with high throughput (i.e. occupancy) and/or consistently parallel tasks"
So, for a non-virtualized server, the real-world performance will depend greatly on the OS/Kernel. 16 cores become significant when you are running high-density virtualization.
