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Maybe they switched things up during editing.
From what I read, the SuperNova is based on a Superflower's Platinum-rated design. I'm guessing Redundant incorrectly presumed EVGA launched the Platinum-rated model first by simply re-branding Superflower's design instead of the cost-reduced Gold version that is already out there and ended up switching them around in release order.
Only the SuperNOVA 1000 G2(120-G2-1000-XR), 1000 P2(220-P2-1000-XR) and 1300 G2((120-G2-1300-XR) models, so far, are made by Super Flower. I wouldn't hesitate in recommending these models to anyone.
The 500W model is made by HEC/COMPUCASE. The 650W and 750W models are made by FSP Group. The 1500W model is made by Etasis. I wouldn't recommend any of these models since there are competitors that offer better performing products.
The professional reviews of the two G2 models have been quite favorable (i.e. excellent).