SEP 14 - GUP vs Cloud Def's - Standard vs Dark Network

With SEP 14 does the standard client installation, that uses the cloud definitions, use the GUP? Or does the Dark network install only use the GUP.

All my remote sites around the world come through our headquarters here in the US for internet access. So, should I not just use the dark network client and continue to use GUPs?

Is there a best practices paper for this? Or am I missing something obvious?