[Sn1F3rt]

Well I myself wanted to answer the question regarding the GS performance in the OP but since @rudra already did, I'll rather not repeat the same thing. I definitely agree with @rudra about the load factor, and that's precisely it. If your VPS is overloaded chances exist, that a KVM VPS might not as well be able to give you the latency you expect, whereas an OVZ one on a lower load, may give you 10x better latency than the KVM one. So it's relative. However, as rudra explained, on a free system definitely KVM gives better performance than the OVZ one, provided you compare VMs of the same specs.

Regards,