
While both mean you haven't been accepted yet, a deferral usually happens during the early rounds (pushing your application to Regular Decision), whereas a waitlist occurs during Regular Decision when the class is full but spots may open up.
Your LOCI should be concise, polite, and reaffirm your commitment to attending if admitted. Use this space to highlight any new awards, improved grades, or significant extracurricular developments that have occurred since your original submission.