The RX 560 and the GTX 1050 (not-Ti) tend to perform neck-and-neck. The 1050 Ti, however, can often be over 30% faster than those cards. There are some games where the RX 560 can hold its own against the 1050 Ti, but for the most part it is in a somewhat lower performance category, even if it matches the 1050 Ti on VRAM. And even a 1050 Ti won't be great for VR (It was a relatively lower-end model when it first came out over 4 years ago), but considering the current graphics card market, where anything more capable is priced 2-3 times its MSRP due to crypto-miners buying up lots of cards, they might be stuck with the same card for a while. Hopefully, cards start to return closer to their MSRPs later in the year, but due to the unpredictable nature of the crypto market, it could potentially take longer for that to happen.
Keep in mind, those videos comparing CPUs in games are typically pairing them with very high-end "enthusiast" graphics cards to prevent the graphics hardware from limiting performance in the benchmarks. In many cases those cards can be priced close to $1000 or more, and you probably won't be getting a card that fast, at least until that level of performance works its way down into mainstream cards, at which point games will be more demanding on them. In typical setups, most modern games will usually be graphics limited more than anything, so as long as the CPU is fast enough to keep up with the graphics card, performance will tend to be fairly similar.
Another thing to consider is that the 8600K lacks SMT (also known as Hyperthreading on Intel CPUs), a feature that allows it to more efficiently run additional software threads. The 2600 does feature SMT, potentially giving it more stable performance in heavily-multithreaded games, which are becoming more common, though each of its cores are somewhat slower, putting it at a disadvantage in many existing games when targeting high framerates (again, in cases where they are not being limited by the graphics hardware). I would say both processors have their advantages, but the 8600K might arguably be the better option for high-framerate usage scenarios like VR, and would generally be the more expensive option to reflect that.
Overall, for running today's games, and for seeking higher frame rates for VR, I would probably go with the 8600K / 1050 Ti system, especially since you might have trouble finding a better graphics card at a reasonable price for quite a while. However, you would want to upgrade it to at least 16GB of RAM, as 8GB is going to cause significant performance issues in many of today's AAA titles.
And assuming that "1TB storage" is a traditional HDD, it would also be best to add an SSD, and install Windows and your applications to that. And if it's a somewhat larger drive, also some of your most-played games, while leaving the hard drive for data storage and maybe some less-played games, or those with short load times. Games installed to an SSD will generally load over twice as fast, though it typically doesn't effect frame-rates significantly in today's games. The 120GB SSD in the Ryzen system might be fine enough for installing Windows and your applications to, but it's not likely large enough to hold modern games, which you might want another SSD for anyway. I suspect we will likely see SSD storage affect game performance more in the coming years though, as the new consoles are exclusively using that.