Transmission spectra of K2-18 b from exoTEDRF (blue), JExoRES (black), SPARTA (orange), and Eureka! (green). For NIRISS and NIR-Spec, faded points show higher resolution (R = 100 and 200, respectively) spectra, and solid colors are binned for clarity. Binned points are slightly offset in wavelength for visual clarity. Smaller panels show error-normalized differences relative to exoTEDRF. The JExoRES spectra used a different binning and are interpolated in the difference panels.