Thank you - that is handy to know. In our case the extra omni microphone would be useful although the speaker would be powered by PoE so the wifi is less needed.
Assuming the speaker volume is set to an appropriate level, is the voice audio quality of the newer GSC3516 similar to the GSC3510? I had wondered if the more powerful speaker might have less definitiion and nuance since it might sound like it was “shouting” rather than just tlaking. The setting it will be used in is indoors in an open plan domestic home with one floor. I have not been able to find any videos giving any real world audio examples of the Intercom speaker family.