Its hard for us to forget the S3. Oh, the HTC Sensation, such a beautiful phone, but the Qualcomm S3, even running at 1.5Ghz is slower than my Tegra 2 at 1.0Ghz.
Now, it appears that the S4 is an improvement over the S3; however, it certainly doesn't trounce the Exynos. It may match it on...