Length differences. Ah.

And others. They are not true clones.

And color differences.

Not originally. There was once only one appropriate color. Black. With black and yellow trains.

Black. Blue. Yellow. Orange. White. All approaches to pain Batman: The Ride clones.

EDIT: Auto correct again. To paint them.

Ironically somewhat accurate, though!

The low to the ground tunnels of Montu make it my favorite, especially at dusk. You feel, in a way, as if you are flying through a desert village. The final element is the best because you are travelling down and to the left through a below ground tunnel and the track goes through a cork screw changing your direction to curving to the right....very disorienting.

http://youtu.be/zQxKTL9fTpA

That is one creepy avatar.