Perhaps it's a regional thing, but there are definitely places where Red-Gold usage comes close to Heinz. I'd still say Heinz is dominant in said regions, but Red Gold does see usage, and I don't think it's just because of a price difference.

Personally, I like Red Gold on fries more than Heinz. Couldn't explain why very easily as I'm not one to use food terms. Maybe a bit more acidic?