Logee's doesn't have either one for sale any more. 'Inca Sun' is listed on iBrug's name list, but Inca Gold is not. I thought maybe BGI might have 'Inca Gold' listed, but I've had trouble getting the site to come up in the recent past. Today is one of those days. I wanted to see if BGI listed it to get the parentage, but no luck.
I did a search for photos of both. The one photo I found for Inca Gold is identical or almost identical to the photo of Inca Sun that Logee's used on their website. Take a look at the plants surrounding the Brug in both photos. They are identical. So is the Brug. I think the Brug is the same one — 'Inca Sun'. Sorry about the size of 'Inca Sun's photo, but I think you can still see that the photos are the same.
This is supposed to be 'Inca Gold'
This is Logee's photo of 'Inca Sun'
I'll try later to get onto BGI's website to see if they list 'Inca Gold'