iOS beta 10.2.1 1 it is as fast as iOS 10.2 in a performance test conducted last night on several of Apple's iDevices. In the videos below you can see both versions of the operating system tested on iPhone 5, iPhone 5S, iPhone 6 and iPhone 6S, and they work equally well on all Apple devices.
Considering that iOS 10.2.1 is an intermediate update, it is unlikely that Apple will improve the performance and battery life of iDevices. Updates of this kind are usually dedicated to solving security problems or performance problems, but new functions and performance improvements should not be expected.
Although Apple will continue to release beta versions of iOS 10.2.1 until the distribution of the final version, it is unlikely that things will change radically. In this idea, a very large part of what you see here for iOS 10.2.1, will most likely be found in the final version of the operating system.
