iPhone 6S Plus ip6spFlickr/TechStageThe fact that Apple is still selling the iPhone 6S, a two-year-old phone, is a testament to how good the phone is.

Usually, Apple offers only the previous-generation iPhone after it announces a new model.

But if you compare the specs of the iPhone 8 or the iPhone X on Apple’s website, you’ll notice that the phones look pretty similar. You’ll be telling yourself: “Yep, the iPhone 6S has this, and that, and that.”

The main differences are the chips that dictate performance and certain features, as well as a few incremental improvements in the iPhone 8 and iPhone X to things like the display and camera. These are hugely important factors when deciding which iPhone to buy, but the iPhone 6S is still a top contender, especially as it now starts at $450.

Here’s why you should consider buying the iPhone 6S instead of the iPhone 8 or iPhone X.