Katello 3.14 activation keys

I am running Katello 3.14 and I am wondering if I can have a single Activation Key manage both CentOS 7 hosts and CentOS 6 hosts. More specifically the Activation Key will have Subscriptions to both CentOS 6 repos and CentOS 7 repos.

It kinda sounds like AutoAttach will figure this out. If not thats ok too but I just want to know.