In the End -- the final 1/4 of the entire page or scene count, the protagonist still has foes to confront and overcome. Only now, she is armed with a new understanding of herself. For the first time, her goal is within reach.
The Climax at the end serves as the light at the end of the tunnel. The protagonist moves toward the light -- one step forward toward the ultimate transformation, three steps back, a fight for a couple of steps, being beat backwards.
The Climax is the crowning glory of the entire project. The Climax is where protagonist "shows" in scene her acting in a transformed way -- in a way she could not have acted in any other part of the story because she first needed to experience everything she does in the book to get to the final stage.
The Climax spotlights the character in full transformation demonstrating the necessary new skill or personality, gift or action.
Ask yourself what scene will most dramatically show her demonstrating her transformed self?