The GCStoGCS operator using the _replace=False_ flag and specifying _source_object != destination_object_, will not work properly, because it is comparing [apples](https://github.com/apache/airflow/blob/main/airflow/providers/google/cloud/transfers/gcs_to_gcs.py#L351) with [pears](https://github.com/apache/airflow/blob/0dd70de9492444d52e0afaadd7a510fc8a95369c/airflow/providers/google/cloud/transfers/gcs_to_gcs.py#L357).

Cause: the _prefix_ in the _pears_ case needs to be calculated from the _destination_object_, however, it is coming from the _source_object_.




airflow/providers/google/cloud/transfers/gcs_to_gcs.py
if self.source_objects.count('') > 1:
            raise AirflowException("You can't have two empty strings inside source_object")
        
        for prefix in self.source_objects:
            
            if WILDCARD in prefix:
                self._copy_source_with_wildcard(hook=hook, prefix=prefix)
            
            else:
                self._copy_source_without_wildcard(hook=hook, prefix=prefix)
    def _copy_source_without_wildcard(self, hook, prefix):
        """
        For source_objects with no wildcard, this operator would first list
        all files in source_objects, using provided delimiter if any. Then copy
        files from source_objects to destination_object and rename each source
        file.
        Example 1:
        The following Operator would copy all the files from ``a/``folder
        (i.e a/a.csv, a/b.csv, a/c.csv)in ``data`` bucket to the ``b/`` folder in
        the ``data_backup`` bucket (b/a.csv, b/b.csv, b/c.csv) ::
            copy_files = GCSToGCSOperator(
                task_id='copy_files_without_wildcard',
                source_bucket='data',
                source_objects=['a/'],
                destination_bucket='data_backup',
                destination_object='b/',
                gcp_conn_id=google_cloud_conn_id
            )
        Example 2: