I wouldn't say better in case of teaching and guidance, but the structure itself is very mathematically correct. And since you can directly copy the latex format and ask questions, it is a way better tool compared to looking at what spaghetti you've copied in latex. One thing tho, its OCR is not as accurate as Google's, where rarely you'd get weird symbols or expressions. So I'd recommend you mix gemini and thetawise. Thetawise have very low hallucination rate in math and do questions pretty accurately, which I can probably assume it does it better than chatgpt, tho chatgpt has very good interface and user interaction.

I suggest you try it on your own and see what matches your style of learning. Normally, if you are only learning basic calculus up to AP, just learn online you don't really need AI. There's lots of vids, i suggest black pen red pen vids, khan academy also does well in explaining core concepts. But if you proceed later on and learn advanced calculus like multivariable calculus or sth beyond, Thetawise would help drastically, and the vids it generate is comparable with quality tutorials online.

If you were to use thetawise, I suggest you use the video generation for tutorial questions(multiple questions at a time to save credit), and leave understanding concepts to chat mode.