I think Intel is best for gaming.
Although AMD has better options for better prices, I think what happens is people don't trust those cheaper prices. Intel imo has better quality in their cpus.
I am currently using an Intel i7 7700k, it works very well when gaming. I play Apex Legends and Rainbow Six Siege.
When I used to play Fortnite, I would get eliminated and spectate my friends. While they would be finishing the game, i would open another game and play while I waited. The game I would open was a smaller, less big game called Brawlhalla. It has 2d graphics and doesn't need much of ur cpu/ram, but it still amazes me that I can run two games at once with this cpu. Ram probably also is a big factor in that, but I have 16gb.
So yea, i think intel is better for gaming. It really goes down to preference, I think.