Faryaab Sheikh, an Android developer, tweeted a picture of the AnTuTu benchmark that shows the Samsung Galaxy S4 features the Exynos 5410 1.8GHz 4+4 CPU. Furthermore, it confirms the 4.99-inch 1920x1080 display that has been rumored for months. The GPU is a PowerVR SGX 544MP.
Of course, benchmarks can be faked, but this one seems to confirm the rumored specifications that have been floating around. Others have also said that the new Galaxy S4 will continue Samsung's history of using plastic shells for the device. One of the nice things about the new HTC One is the aluminum case. It just gives the device a premium feel.
According to those who have reportedly touched the device, it will use a similar plastic body to the Galaxy S3.