Hi @Nokoyashi1
Thank You for posting in Q & A.
ExpressRoute provides network traffic QoS only for Skype for Business, while Azure VPN does not provide this kind of service. You can read more details on ExpressRoute at the link below:
ExpressRoute QoS requirements
https://azure.microsoft.com/en-us/documentation/articles/expressroute-qos
Managing Quality of Service (QoS) in Skype for Business Server
ExpressRoute QoS Configuration
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