A 32-inch panel at 4K puts roughly 140 pixels per inch in front of you, and that density is the reason this size became the sensible entry point into OLED for a desk. Every pixel makes its own light, so black is genuinely off rather than a dimmed backlight, and a bright object can sit against it with no halo around the edge.
Three things decide which model suits you: how the screen's coating deals with the light in your room, whether your graphics card and its ports can feed 4K at the panel's top refresh rate, and how many hours a day the same static windows will sit on screen. Everything after that is preference.
