What matters more your calories over a week or a day in weight loss?

I don't really understand the question.

Weight loss is all about averages, what you do over one day doesn't matter that much in the long run. Of course you'll lose more if you're able to stick to your calorie budget every day of the week,(and every week of the month and every month of the year...) but you can still lose over the week even if you mess up one day.

But being good over one day and messing up the rest of the week is unlikely to lead to any weight loss.