Difference between giving a VM cores and sockets?

[Terminatrix]

What is the difference between the two following set ups? I have not noticed any performance differences inside the virtual machine. Are there any pros/cons between the two?

 

[Dunuin]

That is only useful if your server got multiple CPUs/sockets or you use NUMA.

If you want more performance and don't run a cluster you should set the "Type" from "kvm64" to "host".