Yes, if you want the scent to stick longer, you need a higher concentration, not more perfume.

I like EdP, you apply it in the morning and by the evening only the base notes are left, you can then re-apply if you are going out.

Generelly, the scent of a perfume always develops while you wear it. The top notes that can be smelled immediately after applying are gone after half an hour, then you can smell the middle notes and finally the base notes.

Concentration changes how long middle notes and base notes linger, the top notes always disappear fast.