Academic and non-academic writing differ in format, purpose, and tone. Academic writing is formal, objective, and relies on research and evidence to inform an educated audience. It includes introductions, discussions of topics, and conclusions. Non-academic writing is more personal, emotional, and subjective in nature for a general audience and can include journal entries, memoirs, or letters. Both types of writing serve different purposes, with academic writing aiming to educate and non-academic writing seeking to entertain or persuade.