> But importantly the ChatGPT app experience at least for iPhone/Mac users is drastically superior vs Google which feels very Google still. So Gemini would have to be drastically better answer wise than ChatGPT to lure users from a better UI/UX experience to Gemini.

Opposite is true for a larger market. Gemini is great and available with one button click on most consumer phones. OpenAI will never crack most Android users by this logic of yours