Minor quibble. It's not "the exact same interface".

From the docs:

By utilizing a new feature of the upload method this process can be si
+mplified to:

    $ok = $q->upload( $q->param('upload_file1'), '/path/to/write/file.
+name' );
    if ($ok) {
        print "Uploaded and wrote file OK!";
    } else {
        print $q->cgi_error();
    }

As you can see upload will accept an optional second argument and will
+ write the file to this file path. It will return 1 for success and u
+ndef if it fails. If it fails you can get the error from cgi_error.
[download]

imo, a nice improvement.