Hello,
First of all, you have to join the two hosts to same Cluster under same vCenter. and configure the vMotion between them.
Also you need to share the storage to all hosts, after this step you can move VM from host to other.
Also as I understand, it seems that these VMs are on local datastore on the old server, if that is the case you have to configure new local datastores on new host as the same version configured on the old one. and then do the storage vMotion between datastores (Sure after configure the cluster with vMotion)
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Cheers,
VCIX6-NV|VCP-NV|VCP-DC|