It really depends on the nature of your project and the desired outcome.
Here are some points to help you decide:
● If you’re creating a final printed product (e.g. a book, poster, packaging), InDesign would be the preferred application as it provides more tools and features to achieve a professional finish.
● If you plan to use photographs or complex vector graphics (e.g. logos), Illustrator might be the better choice as it offers more detailed graphics manipulation, including support for layers and live effects.
● InDesign is better suited for creating multi-page documents, such as magazines, brochures or other publications, whereas Illustrator is designed for creating single-page documents.
● If you plan to use illustration, drawing and typography in your project, Illustrator could provide more features and tools to achieve the desired end result.
Ultimately, the decision would depend on the complexity of your project and the desired outcome. If you need help deciding which application is best for you, check out this helpful comparison guide: https://www.techsoup.org/support/articles-and-how-tos/which-adobe-app-should-i-use.
Good luck with your project!