Rafael Mestdag :
Guys, just take a look at this youtube video and check it for yourselves:
https://www.youtube.com/watch?v=9lCq8Qk9wjY&t=218s
In the video the FX 6300 loses badly in a GTA V fps competition to my 3570K and - believe it or not, just watch it - the 3570k also comes really close to an i7 6700K!!!
You're comparing apples to oranges
Like i said there's no doubting the 3570k is/was an excellent chip. But even still, it has it's limitations. Of course the FX6300 is gonna lose badly to a 3570k. They are two vastly different architectures, and the 3570k stomps all over the FX6300 in every single way. No one would deny that.
With regard to the 3570k and 6700k being close. Well in very limited scenarios that may be true, as it's purely comes down to clockspeed and the way programs/apps don't take advantage of more than four cores (3570k) but when ou say close, close means within 20% (The IPC increase from one generation to the next - at least with Intel). With that said, in those apps that do take advantage the i7 6700k will absolutely mash up the 3570k. It's not even a fair comparison. The 6700k is a much better chip in every way.
I don't mean to sound patronising, but just read a little more about the chips and you will understand better the limitations and differences between both. Youtube vids, as much as they can be helpful, are not the best way to get detailed information about the nuances between different platforms/CPU architecture.