1440p screen or 4k screen ?

Hi

I'm considering an RTX 5080, but I'm torn between a 1440p and a 4K monitor. So far, I've only had 1080p, and I don't really know the difference in quality between 1440p and 4K. I think with a 1440p monitor, I'll get more frames per second, but a little lower image quality than with 4K. And with a 4K monitor, I'll get better image quality, but much lower frames per second. Does anyone know what monitor to pair with an RTX 5080 for long-term play in both competitive online multiplayer and AAA single-player games ?