Yes. An Asañña Brahma does not have any citta arising.
The main difference is that Brahma will be reborn when the lifetime in that Brahma realm expires.
– That is because not a single anusaya or a samyojana that binds to the rebirth process has been “broken” in an Asañña Brahma.
But an Arahant will not be reborn after the death of the physical body.