styled-components allows you to use native CSS in (kebab-case) in the declaration by using template literals(the backtick) whereas glamorous requires you to structure the css as JavaScript objects using camelCase.
It's mostly a matter of personal choice, if you are familiar native css and enjoy writing it, I say stick with styled-components personally as I can write media queries and animations the way I am used to when using vanilla. plus styled-components has some of the features that I use from Sass namely nesting.
it's mostly a matter of personal preference.