Frameworks are different "lenses" for viewing your tasks. Same tasks, different worldview.
Think of it like this: Your tasks don't change – just how they're organized and displayed. A task like "Finish presentation" might appear in "Next Actions" in GTD, "Important/Urgent" in Eisenhower, or "Projects" in PARA.
Why bother? Different frameworks click with different brains. Some people love GTD's capture-everything approach. Others prefer Eisenhower's urgency focus. Try a few to find your match.