Why unity game looks somewhat blurry than Unreal game?

After build, game made via default setting of camera, why its entire graphic looks not sharp?

Whileas, game made via Unreal shows very clear, sharpened graphic.

What do I need to change for unity game look like that?

Texture resolution import settings, camera image effects like antialiasing, the graphics settings in the player options, different shaders/materials? All might have an effect.