First when you compare specs in mind, iPhone 6 has much lower specification than all Samsung Flag ship phones. they almost have quarter ram. Best you will be shocked when you see how the ram is utilized in detailed report by GameBench.
In past, ( April ) AppleInsider detailed graphics performance of iPhone 6 and 6 Plus against Samsung’s Galaxy S5, S6 and Note 4 (detailed above). So by chart you can see iPhone 6 and 6Plus have beaten all Samsung phones.
Now GameBench, gaming-oriented benchmarks firm performed its own games evaluation of with Galaxy S6, iPhone 6, Google Nexus 6 and HTC One M9, Evaluating FPS ( Frame Per Second ) while playing a variety of different types of games from various developers.
By test results, Apple iPhone 6 performed best in terms of FPS as well as minimum FPS achieved during testing. and Good news was that iPhone 6 also scored best in “FPS Stability”, in high performance gameplay.
The firm’s full test report details that “iPhone games use around a quarter of the RAM of the Android games we tested,”.
Being faster while using less hardware indicates that Apple’s iOS software (along with the platform’s third party apps) is better optimized, which also helps iOS devices to claim better battery life on smaller, thinner devices
Instead, to achieve compatible performance with iOS, the quality of graphics was scaled back on Android, something that isn’t apparent when looking at benchmarks but is visible when looking at GameBench’s comparative screenshots.
Despite a higher resolution, Galaxy S6 graphics lack detail. Source: GameBench