Yes, there's no slipper clutch. Not having it increases your torque because the gears will always try to spin, but it also increases your odds of blowing the board if you push it too hard up a difficult hill or with something stuck in the tracks. Also, the metal gears require that you break them in; stock (plastic/nylon) gears do not.

You could glue the slipper clutch to nullify that "feature". In that case the metal gears would be more durable than the plastic ones.

Of course, there is also the increase in weight and gear noise from the metal.

Overall, they're the same gear ratios with the same motors. Just plastic versus metal.