Although "east is east and west is west" and the two species keep a conservative distance, apart from the obvious differences that can be seen in their "passport photographs," their physiques and olive- brown bodies could be from the same mold and their habits and personalities bear more similarity than difference.
雖然兩者「你在東來我在西」，楚河漢界，嚴守分際，但除在「半身正面」照片上顯有不同外，兩者體型與橄欖褐色身體卻如出一轍，且習性、個性大同小異。