The way to think of licensing, especially if you've been through a few audits, is that licensing is paper based. Licensing is not handled by the SQL Dev team, it's a separate department in Microsoft. The upshot being, there is no reliable way of telling what type of licence covers an install, it comes down to reconciling what licences you have with your install base. Microsoft or your licence reseller can help you by providing a list of what licences you have (assuming you are covered by an EA), you can match that up with what you have installed.