[frizzen]

I haven't seen the Motorworks ones...

but I've got a pair of the "master" brand oval-bullet TANKS and they kick ass! If you have a gentle enough entrance to a barrier, they can climb almost anything!

The only thing is that the treads can strech a bit, and there's no tension adjustment.

And like a bit/zz/mw/whatever you only get binary control. and driving a tank with missmatched motors, it's a challenge. It makes it look like your guy driving the tank is drunk!

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In conclusion, Toys of Mass Destruction are cool!