Whatever captures most of your attention should be better for you in terms of comprehension and memorization. You can hardly read a book and pay attention to something else. You can walk and check your Instagram feed while listening to an audiobook.
Validity of this study might be disputable since I'm not as experienced scrutinizing scientific studies, but visual and auditory information is shown to have close corollary effect. Retention and comprehension is supposedly similar, so I agree with you. Engagement is definitely key.
