The following voice functionalities are not available without the PEFNG license:
VOIP ALG support (such as SIP, SCCP, and H.323)
VOIP CAC functionality
Voice mobility
WMM content enforcement
Battery boost
WPA fast handover support
SIP authentication tracking
Custom WMM EDCA profiles for SSID profiles
And i dont think you need the PEFNG to control the BW per SSID i mean if you want it per VAP you can assign a porcentage( a share) on the QoS profile like 40% of the BW to x SSID and 60% to y SSID...
But if you want to limit the BW for example per ap group, per user or per role you need the Pefng license as you do it on the ROLE, and you cannot modifiy the role unless you have the PEFNG license...