would ofc be more energy in total, but much less efficient. if you fill the white spaces with shields, and build 2 5x5x5 blocks like this, you get way more energy*shields than if you build two solid 5x5x5 blocks, one energy, one shields.
Point is: This design is ofcourse not the most energy you can get out of 5x5x5, but the most stats/mass you can get out of your ship design.
EDIT: To the OP: You could try and make the Picture show the layers vertically, not horizontally, for then it\'d fit into the forums design :D