as I know .hsp-files are specific for Becker software. This means you can only use these files with Becker and not with any other. And vice versa you can't use .hsp-files with another software. There you need the *.fsp-files which Becker can't work with.
So you need only one type of files: *.hsp if you use Becker, *.fsp if you use any other software. You can delete the unused files for saving memory.