I had chat.openai.com saved to my homepage so here's my finding so far:

- snappier

- search through conversation history via title search

- whisper built in for record -> transcribe workflow (does not work "live" unfortunately)

- easier to scroll through history and delete history

- long press prompt or response to copy/select text or perform voting/regeneration actions

- better text resizing support (via the control center's Aa text resize option) (online resizing text made things way too cluttered)

Probably more but all I've found from about 10 minutes of playing around.

Definitely better UX from my perspective!