Caporegime
Cinebench is a very good (and fair) indication of CPU performance. A gaming benchmark can depend on who sponsered the game. The industry needs a 100% unbiased test that doesn't suffer from being poorly optimised.
Correct, if the game is developed in a game engine running on an Intel CPU and the dev doesn't pick up AMD's Ryzen Data sheets and makes the necessary adjustments to the game code then yes it will run better on Intel.
That doesn't mean Intel has inherently better gaming performance, they don't, they really don't, and before you think it, games these days are optimised for AMD as well as Intel, since that's what's in all the game consoles.