Working with views, better use various displays or create more views?
In the book "Mastering Drupal 8 Views" Greg Marshall suggests that there is no strong reason to prefer one or the other. He suggests using separate views most of the time, for the simple reason that it's very easy to make a mistake in the UI and apply a change to all displays when that wasn't what you wanted.

I would suggest that you think carefully about in what circumstances you are going to want to modify a view. If changes are likely to affect all displays, or be only applicable to one display of a certain type, then having a single view is fine.

If changes would likely be to multiple characteristics that could apply to all displays but you would want to be different on each display, then isolating them as separate views reduces the risk of getting in a mess.