We recently switched from Meet back to Zoom, because Zoom lets you use your speakers while Meet requires everyone to use a headset.

Zoom does some kind of active noise-cancelling where it will avoid picking up whatever the person on the other end just said, preventing the echo effect. Meet doesn't, it picks up everything. So if you use a speaker, everything the other person says gets repeated back at them.

When Meet recently announced noise-cancelling, we got really excited, only to be disappointed when they were referring to cancelling of background noises and not of participants.