AutoWorld produce copies of the old Aurora T-jet Tuff-One, Magnatraction and 4-Gear 'Speciality' chassis. The AW versions are called the Thunderjet 500, X-Traction and 4Gear. More recent releases have a small neo traction magnet added and these versions are given the suffix 'Ultra-G'. All the 4Gears come with two neos.
My personal opinion - which differs from the 'official' AVHORA line - is that the AW versions are fab
You'll find AW components in the AVHORA Magnatractions as hop-up parts.
To be honest, quality control does let the AW cars down occasionally, but my experience is - if you buy new - you're unlucky to get a duff one. If you buy used cars from eBay, then you can't really blame AW...
As for the SuperIII, that is an original AW chassis. The general consensus is that it is a disappointment. There was a recent thread in this HO forum discussing it. See here
If you want to run some Super IIIs at home, they will be an interesting challenge to get going well. But to run they at EAHORC - forget it, I reckon