Comparison between RM-synthesis and QU-fitting for boxes 49, 4, 10, 24, and 34. Left: cleaned (black) and dirty (green) Faraday dispersion functions (FDF) obtained using RM-synthesis. The red dashed line is drawn at the 8σ_QU level. The magenta lines indicate the peak positions (ϕ_max) of the FDFs. Right: corresponding QU-fitting spectra, the fractional Stokes q (blue) and q (red) with the dots showing the QU-spectra measured in the boxes and the dashed and solid lines are the one and two component fits, respectively. We also mark the one and two component fits with brown circles and dark blue asterisks to clearly indicate the significance of these markers used in subsequent images. For boxes 4, 10, 24, and 34, the QU-spectra are better fitted with two components. Correspondingly, RM-synthesis shows broader FDF for these boxes. For simple regions, the example box 49 is shown. We find that both RM-synthesis and QU-fitting appears to be consistent with a single Faraday component.