No, there is no automatic way of using the same template to export and import.
1) The only difference between the Export and Import templates is the 'stocking unit' in export (field #5). Remove this (and save) and you will now have similar templates (apart from the file name, which you can edit).
2) If you are exporting to make changes to existing alternate price list items, you are not required to export the entire list of fields. You only need Price List code and Item code (and Currency if your data uses Multi-currency), and any fields you are updating, such as Base Price, Sale Dates or so on. This is easier to maintain and make sure the templates are the same.
3) Use different templates for updating different fields as necessary. Perhaps have one to update only Base Price, and a 2nd to update all amounts. Of course this depends on how you want to do your item maintenance.
4) To help make sure your templates for import and export match, use the Print option to print the template layout, including file name and field sequence.