Thank you for thorough answer. I misspelled, I was supposed to write cores. Oh well. I think I came to conclusion and will go with i5 10600K. It has 6 cores and base speed is 4.1Ghz. And with slight OC it will get 5Ghz. That is plenty for my needs. The 3300X is bit too slow. As you mentioned, I will most likely just lose more money. So I thought I will go with the Intel. As my computer has to perform both DAW and games, I think Intel is a safe choice.
I never even maxed out my old 4770K with 12Gb of RAM…
Still got to heal my ears for a bit before I try to make music again. 
But thanks!