Although these two had their time in the spotlight, some years back, it seems like they have been "erased".
Every artist eventually stops having success, so that is not the question per se, but it seems like these two have really vanished in any sense. Even their new jobs are not getting them much attention.
Who has been more "erased"? Ashanti or Mandy Moore?
Probably Mandy because she wasn't as successful as Ashanti to begin with. Didn't Ashanti have 3 Platinum (one being multi platinum) albums? She did quite well for herself.
Mandy only had one moderately successful era. Although "Candy" will always be a masterpiece.
Ashanti had a larger and more recent success. Mandy was unfortunately a fast casualty of the post-bubblegum, pre-Urban pop landscape and while some of the other girls were able to cross that gap, Mandy never did.
Mandy is more global than Ashanti in the first place. I voted for Ashanti. Nobody even knows her here even during her prime in the US. While Mandy's flops were still played on our radio and music channels.