i think, all things considered, sleep is more important because everything goes wrong when your body and brain aren't getting enough sleep

plus, when you are tired, your ghrelin (hunger) receptors are overactive, and willpower and patience less.

also, yes, when you're not getting enough sleep, your glymphatic system isn't able to fully flush out your brain https://www.sciencedirect.com/science/article/abs/pii/S0301008220301726