The same leaker also claims Apple will offer cyan and deep red colors as this year's unique color options for the regular and Pro models respectively. We'd assume these will join the usual array of iPhone colors, such as black and white for the base models and silver and gold for the Pro models.
Flagship iPhones have come with glossy glass backs since the iPhone 4 back in 2010. However, when Pro iPhones arrived with 2019's iPhone 11 Pro, Apple differentiated them from the non-Pro models by using frosted/matte-textured glass on the back. But if this change is coming, then the design of Pro and non-Pro iPhones will be closer than ever before.
The family resemblance grows
This similarity will be helped by the iPhone 15 allegedly using the Dynamic Island on all models. And while it won't be as noticeable at a glance, all models should receive a 48MP main camera too. Both of these features are currently exclusive to the iPhone 14 Pro.
If these changes do indeed happen, it looks as if the major rumored differences remaining are the Pro's third telephoto camera on the back (possibly with a stronger periscope lens on the Pro Max), its newer and more powerful chipset, and its 120Hz ProMotion display. Those are some pretty significant differences, so we can imagine the Pro models will again be the better, and more popular, iPhone 15 models at launch.
Apple is likely still set to tell us all about the iPhone 15 series in September as usual. Until then though, we'll be reporting on any convincing leaks that emerge, and rounding them up in our iPhone 15, iPhone 15 Pro and iPhone 15 Pro Max hubs for easy access.