i went to Walmart today, and i can say (for a fact) that you get 1 GHWT guitar and 1 GHIII guitar, not 2 GHWT guitars...
and the same thing goes for the Wii dual guitar packs, you get 1 black GHWT guitar and 1 white GHIII guitar...
and i wouldn't say the GHWT guitar is getting RAVE reviews. basically, if you have a GHIII guitar and don't need a new one, than don't get it. if you're really brutal on your equipment, than get the dual guitar pack, because spending an extra $60 for 2 good guitars now is better than spending more for the same thing later on...