Well, caricature Nancy might be depicted with a wild expression or an unusual outfit. These elements are used to add a touch of comedy and make her visually appealing. Also, her proportions could be played with to give a unique and comical look.
To draw a caricature of Bob Marley, you need to exaggerate some of his prominent features. Like making his dreads longer or giving him a larger-than-life smile. Also, pay attention to the proportions to make it look funny and recognizable.
Famous cartoon Christmas characters often have cute and charming looks. They might have special outfits related to Christmas, like Santa hats or elf costumes. And they usually have kind and friendly personalities to spread the Christmas spirit.
I think it's just a random and unfair comparison. Maybe made by someone with a bias or trying to be deliberately provocative. There's no real resemblance or logical connection.