A dim-out fabric will reduce the amount of light that is coming into the room whilst maintaining your privacy. When the blind is down, a screen baric will filter the amount of direct sunlight and heat transferred into the room. However, you do sacrifice privacy in the evening time.
A translucent fabric will allow light still to shine through your room while maintaining privacy. A screen fabric will defuse the amount of sunlight that is coming inside of the room but still allows you to see out of it. On the other hand, a blackout fabric has no light penetration and is ideal for bedrooms.