You have to read carefully. I said it didn't beat it in ALL the tests. For example,
7-Zip opening data(compression/decompression),
RealBench Heavy Multitasking,
HandBrake test(except 4K)
And since you've mentioned GTA 5, i9 beats AMD there(in games) too, it performs much better when you're playing a game and doing some WinRar unpacking of large files. Although i doubt someone would ever buy it for the gaming.
Surely, due to threads and cores it succeeded in 4k video-rendering and had overall a better multitasking when many tasks like rendering, 7zip compression were used at once. So the new intel gen will surely beat it.