Anecdata for myself.

Weed makes me much more still during the night, and suppresses my sleep talking entirely. So either it makes me not dream or it has other effects going on making me a more still sleeper.

I'm using both terms as equivalent to "I don't recall dreaming".

The reality, I hesitate to speculate.

It's what's left when you remove any sensory experience. Things happen, and when I wake I have the short term memory that they happened. You could describe it as narrative, but that would imply that there's language involved, and it's more abstract than that.