Numerical range is only used if you’re using the Slider Input and set its type to range. That enables users to pick two numbers, and the these numbers are stored as a numerical range (like [1, 10]). You can then access the min and the max. It’s useful if you want your users to set a price range, or something like this.
Date interval is a way to quantify the difference between two dates. It/s the number of days/hours/minutes/etc between them. This is what gets returned when you do a minus between two dates.