Regardless if you set the MQA Capabilities to “Renderer Only” or “No MQA Capabilities”, you will receive the MQA Core Decoded 24/88.2kHz or 24/96kHz stream on your Bowers & Wilkins zone.
The difference between the two options is that setting the zone to “Renderer Only” will result in Roon embedding the MQA Signaling Information in the audio stream for further MQA DACs to unfold. Since the Bowers & Wilkins devices do not implement MQA features, you can set this to “No MQA Capabilities” without any loss in functionality.