AMD Catalyst 15.7 Linux Benchmarks: R9 290 Hawaii & R9 285 Tonga

I'm in the midst of a new large open-source and (separately) closed-source NVIDIA/AMD Linux graphics card comparison on the latest drivers as part of an upcoming Radeon R7 370 Linux review and to be followed by R9 Fury Linux benchmarks. However, for those interested in the Catalyst 15.7 benchmarks on Linux, I ran some quick tests with a Radeon R9 285 and R9 290...