Differences between sending an MQTT message and using Zigbee2MQTT?

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Hello,
I’m redoing my scenes for heating and while looking at the different available actions, I noticed that there are Envoyer un message MQTT and Envoyer un message Zigbee2mqtt which look very similar or even identical visually.
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Is there a major difference between these two actions on the backend?
If not, is the one with zigbee2mqtt still useful knowing that MQTT handles z2m and virtual devices?

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In Gladys, zigbee2mqtt does not use the same broker as mqtt unless you install it yourself

3

Thanks @_Will_71 — I hadn’t thought of that, since I do indeed have an external MQTT broker common to both integrations, so there’s no difference in my particular case.