Google Classroom is a free way to organize a class and assignments. Lumina is a commercial platform for a branded academy, course prices, Fawry collection in Egypt, and a question bank.
If you need a school class tied to Google accounts, Classroom fits that. If you need an online course platform for MENA or the United States on your domain, Lumina is the closer tool.
This is a factual comparison, not an attack on another trademark.