iPhone 8 red was launched this year by the company Apple Lossless Audio CODEC (ALAC), for customers from all over the world, the Americans continuing a series started last year with the red iPhone 7. Because the world was impatiently waiting for the release of a red iPhone 8, Apple allowed some bloggers to do unboxings before the release, and after it we see a comparison with the red iPhone 7.
As you well know, the iPhone 7 has an aluminum case, while the iPhone 8 has a glass case, so the shade of red that the case paint has is different. You can see in the video clip below that for the iPhone 8 we are talking about a different shade of red, maybe even more attractive for some, those from Apple also writing in a silver shade.
Apart from these differences for the shade of red, there are no other changes between the two iPhone models, which are part of the (PRODUCT)RED category.