I just happen to run a sort of comparison marathon among many films shot under same daylight conditions. These two were there. To me I found the Superia to have more saturated colors than Kodak Gold equivalents. Kodak approximates more to faithful colors. I find the Kodak 200 and 400 to be a little more grainier than their Superia counterparts at 200 and 400 respectively. If you are attracted to saturated colors with more contrast as I am, Fuji Superia may be your choice. If you prefer more natural color renditions, you may lean towards Kodak Gold. When scanned with my Nikon 9000ED, the worst score in my opinion goes to Kodak Ultramax 400. very grainy and colors off with default settings. Kodak Portra 160 is my clear winner if you need outstanding skin color renditions with intense colors, yet not out of reality. it also scans the best, very fine grain. Scanned correctly this picture can pass as a Digital image at low resolutions or an 8x10 print. At last I was dissapointed at my Fuji 400H results. Although the most expensive, I found the colors to be faithful , maybe so much that in my opinion they are more on the dull side.
All these opinions remain nothing but my opinions. Opinions will vary from person to person and equipment to equipment.