You do realize that website is not a gaming benchmark site....right? Of course AMD is going to be ahead in synthetic benchmarks that can use all of the CPU, it has 12 threads vs intel's 6. The problem here is games rarely if ever use over 6 cores and ipc/clockspeed/latency are far bigger factors here and intel holds commanding leads over amd in those categories.
2600=4790k gaming performance. If you want to buy 5 year old tech AMD is for you.
Edit: Funny enough the website you just linked me does have a "gaming portion" and they agree with me lol. 87% gaming score for the ryzen 2600, 85% gaming score for the 4790k. Now take a look at the 9600k (ill save you the time, it has a 105% gaming score).