Did you read the article? That's where you're confused here. I know what both are, you're preaching to the choir.

Read the article you'll be less confused.

https://www.phillymag.com/news/2018/08/11/mayonnaise-industry-millennials/

As Boston chef Scott Jones told Ari LeVaux, “The magic that sets mayonnaise above Coke and Heinz is that mayo is a perfect flavor carrier.” It just makes everything better. Need proof? Do other condiments have pale imitators like Miracle Whip and Just Mayo and Vegenaise? I don’t think so!