The key thing is whichever you choose, stick with it, because as soon as you start complicating things it can cause all sorts of issues not only with tracking but also with how Google would see those domains as being either duplicate, all the same, or different pages competing against each other. It can cause all sorts of knock-on effects. Realistically it doesn’t really matter, and there are click-through rate studies that would suggest things like www dot prefixes can be beneficial in some areas, but again that changes by industry etc.
But it doesn’t matter from a user point of view or from a search point of view whether you have a www dot prefix or not, as long as once you’ve chosen one to stick with it and make sure all other variations point back to that same decision.
You definitely don’t want to have two variations running and you don’t want to have some pages with www dot and some without because it just causes all sorts of crawling, indexation and duplication issues for content and other areas too.
You should also stick with it across your other analytics platforms. With Google Search Console specifically, you can you can trip yourself up sometimes if you’re not tracking the same one then you’re just not collecting the full amount of data, and as we said earlier the most complete data set is the most important so it’s not just about choosing the one and going with that, it’s making sure that it’s replicated across all of your other analytics tracking.