Hmmmm, some travel back in time is required... Back when Zen1 was introduced, Intel had like 90% market share and virtually everything was optimized for their CPUs. Games, software, benchmarks - you name it.
To be honest, optimization for something like Bulldozer or Piledriver was, well, stupid.
Times had changed, and now AMD sells more new CPUs (or one-before-new) than Intel does. Everything is optimized for both. The same set of tests, *if* the mentioned piece of software was still updated and optimized, will result in different numbers if repeated today.
Much the same goes for games, they are mostly NVIDIA-optimized at top level - which may change, too.
Apart from that, "final and deciding parameter" - of course, "the gaming crown" is such a ridiculous measurement - done at Ultra settings which serve for reducing speed and mostly nothing else and at the resolution which is already outdated, and does hundreds of FPS. Really useful.
Anyhow, regarding reality - things change, new firmwares, new drivers, new software optimization, Windows itself...