I assume by “these two” you mean qemu64 and qemu32? I’m asking because QEMU is deprecated in favor of KVM which makes the naming a little confusing, there are also kvm32 and kvm64 models on the list. Only in terms of anonymity is qemu32 as good a choice as qemu64? Same question for kvm32 and kvm64.
By passing info through from the underlying hardware do you mean only the CPU info, as everything else is virtual?