Yea, early Nikko and Tamiya were very similar, especially their buggies. Also, on a side note, Radio Shack and Nikko are pretty much the same trucks, or were in the 90s anyways. Most parts of their bigger trucks and buggies are actually interchangeable. There was an even bigger truck than Thor made by Radio Shack that had a Ford F-150 body and dual 540 motors, but it was too heavy and took forever to get up to speed. Yea, those single 540 2wd Nikko trucks, like the Scorpion, were pretty cool also. They are kind of like big Bandits

Speaking of scale of RCs, this is where things become rather inconsistent. Different brands seem to define their own scales. For example, some would call a Thor 1/10, but then again a Tamiya Bruiser is called 1/10. Both the Thor and Bruiser have a Toyota Hilux body, but the Thor body is quite a bit smaller than a Bruiser. Then again, I have a HPI Desert Trophy truck that is claimed to be 1/12, but it is bigger than a Bruiser 1/10 body. If you ask me, I would say Thor is 1/12, a Tamiya Bruiser is 1/10 and a Tyco Bandit is around a 1/14 or 1/15 scale.