Save file as "clone no records"
It's also possible to store two "completely different sets of data" in the same table and still be able to work with just one data set at a time. This can simplify many tasks for you . For example, with two or more copies of your file, if you find you have to update the design of one of the layouts, you'll have to open each copy and perform identical updates on each.
To work with different data sets in the same table, you simply need to add one more field and use it to identify which records belong to a given set. You can use both find's and sorts on this new field to isolate different data sets.