I have been saving seeds from an orange grape I also got from Aldi. Same experience in that it's the same as what we bought. At the time it was the first orange grape I had ever seen. Not yellow or gold but ORANGE. Personally I think that tomato is as close to the original Sun Gold as anyone has gotten with grow-outs.
Here is my page on it.
http://knapps-fresh-vegies.com/aldi-orange-grape.html
Carol