The latest leaked video of cases seems to suggest that the iPhone 15 Pro will be broadly similar but there is certainly enough room for a USB-C port rather than the traditional Apple Lightning connector and looked at carefully it appears that the button layout is changing too.
The case leaks below (which originated in China, and spread via Weibo, a Chinese social media site) also show a smaller cutout for the mute switch – some think this confirms the idea we're expecting a mute button with the new phone.