Except it's not clickbait - I'll cite Wikipedia so you can look yourself, but they're not the same thing.
Rose Gold is a proper alloy of Gold, made with Copper.
Purple Gold is an "intermetalic" (which have a different molecular structure to normal alloys and thus are more brittle), and is made with Aluminium.
Due to it's brittleness even amongst intermetalics, it is considered hard to work with, much more so than a proper alloy like Rose Gold. The only similarity they share is their colour ranges can overlap dependent on how they're made.