Besides lacking some other features (as mentioned in another comment), it is worth noting that even though it’s using the same SoC it is clocked lower at 1.1 GH

Besides lacking some other features (as mentioned in another comment), it is worth noting that even though it’s using the same SoC it is clocked lower at 1.1 GHz vs the iPhone 6’s 1.4 GHz. (Source: https://browser.geekbench.com/ios-benchmarks https://browser.geekbench.com/ios-benchmarks )