We would recommend Gamma a million times over Canva, even though we use Canva daily for other things like banners for this website. But Gamma is spezialised for presentations and they do it really really well. Both use AI and can create slides in seconds for you, but we have found Gamma to work best compared to all other tools for creating slides because its fast, cheap and creates beautiful designs with superb content. Canva has nice presentation templates but when you create a presentation from a prompt with Canva, it looks rather basic. They have a few nice features, like tone of voice writer, but you still have to add a lot of content yourself. You can find an image of a presentation deck Canva has created here: https://www.aitoolssme.com/blogs/canva-for-presentations-review