Whats the difference between bode plot linear and cartesian?
Cartesian is, essentially, a Nyquist plot (i.e. a complex plane graph) but you've chosen to plot just the real component (x) against frequency (i.e not including the imaginary component).

Bode gives amplitude (\$\small \sqrt{real^2 +imag^2}\$) and phase angle. You've chosen to plot the amplitude against frequency, and not the phase