I see a lot of people like KVM much more than OpenVZ. Some of them, actually, seem to think that OVZ is BS!
I found out that some providers offer an excellent OVZ boxes with great stability and very good performance, when some KVM boxes are disappointing (terrible disk ios and cpu).
Ok, some resources as RAM are more dedicated with KVM and theoretically there is no overselling, but in real life, is this true? Also, OVZ can handle better the resources, so, you need less ram.
Don't you think that at the end, all depends on the provider?