The Porsche type is less than eight and one less than the Henshell type nine, so you can tell the difference, but the smaller diameter of the Porsche is also more than that, so you can tell the difference even if you can see the whole wheel.
ポルシェタイプは転輪の数が8とヘンシェルタイプの9より1つ少ないので見分けがつきますが、さらに転輪の径が小さいので転輪が全部見えることでも見分けを付けることが出来ます。