LTT Labs, which conducts hardware testing, has published the results of its comparison between Apple’s foldable smartphone, the “iPhone Duo,” and the iPhone 18 Pro and a Samsung smartphone. In addition to CPU and GPU performance, it also examined heat generation and performance degradation under heavy load, as well as differences in battery life depending on the screen used. iPhone Launch 2026 Testing - Round Duo | LTT Labs https://www.lttlabs.com/articles