Ceiling fan improves air movement and allow you to tolerate a higher set temperature on your A/C unit. The actual energy saving varies depending on the “new” set temperature you feel comfortable with.

With window units, you have more control on which rooms need to be cooled. The decision depends on the house and how many people live in that house, etc.

On a side note, I was told that some newer energy efficient A/C model is designed to cool but not very efficient to remove moisture from the air. If you live in Gulf Coast Texas where humidity is high in the summer, you will have to make the set temperature somewhat lower than you would have if you were in a dryer region. That’s unfortunate because you will pay more electricity.

its the same shit