The Exynos 7872 was released a few days ago, and we're impressed, especially by its performance.
https://www.notebookcheck.net/Samsung-s-new-Exynos-7872-brings-class-to-the-budget-segment.278876.0.html
It most certainly is no where near beating an adreno 506. We're talking about a 30 gflop gpu here, adreno 506 is a 130 gflop gpu. I'm sure the benchmarks will follow suit :)