Alright, I'm back. As to their distribution, w. cinctus is found from the Cane river and Mardie south, to Ullawarra and Mt. Vemon, and east to Jiggalong. This was determined by the finding of 66 specimen. The finding of 35 wheeleri wheeleri were all south of that. The northern most w.w. was found about the same latitude as the town of Carnarvon, but this is the same as the southern most finding of w. cinctus.
So I guess its not a much different part of the country, but still a curious difference. The climate is slightly different, the w.w. were found in slightly cooler areas with more average rainfall, and the w. cinctus were found in areas with more variance in elevation and closer to the coast.
If anyone runs across anything more substantial I would love to read it, because, like I said, I can't really find anything beside what I have here.