In my case I currently have a cluster with hosts with cpu Intel E5-2680 v4 (each socket with 14 cores) and their Cluster is set as "Intel Broadwell Family" and I would like to add in the same oVirt Cluster two more hosts with Intel E5-2640 v4 cpus (each socket 10 cores) that should be the same CPU Family Type. 

Is it true?

Is there a sort of matrix where one could compare and match?

Thanks in advance,

Gianluca