The verdict
If your team already builds decks in PowerPoint or Google Slides and has a template and a brand it likes, pick Plus AI. You get quicker first drafts without changing how decks are stored or sent.
If you want a tool that enforces layout and brand so decks stay tidy whoever builds them, pick Beautiful.ai, and accept a new editor.
Neither has a free plan, so test both with a real deck on the trial. With Plus AI, watch how many credits a typical deck uses, and check how your own template behaves. With Beautiful.ai, check what breaks when you import old decks.