Don't agree in EVERY resolution,obviously depends on the game. I'll link you to some benchmarks later if you want.
We'll let you know about the key differences between the Ryzen 7 5800X3D vs Ryzen 9 5900X according to their benchmarks.
tech4gamers.com
COD Pacific, cyberpunk,GTA 5,Halo and others at 1440p 5900x is faster didn't look at whole article they trade blows but says 5900x 5% faster overall on games plus 5900x is cheaper for 1440p +.
Now to pacify things. I can understand there are a number of games where the 5800x3d can beat the 5900x but then there are a number where the 5900x can beat the 5800x3d. Whatever one you go for will be dependant on what love of games whoever wants to do that.
For me personally 5900x as cheaper is very good,runs a bit cooler and for my games id rather put money to g card possibly. Not worth the extra cash for x3d for me.