Bode Plot of Performance of Three PSS for Interarea Oscillation

https://www.mathworks.com/help/physmod/sps/examples/performance-of-three-pss-for-interarea-oscillations.html?s_tid=srchtitle In this excample, what is the different between bode diagram plot (fig.3) and frequency response plot (fig.2) ? If same, why the result of bode diagram plot (fig.1) and frequency response plot (fig.4) is different ? Best regards