Comparison between the current results and those of LOFAR20 at redshift z≈9.1. The top row shows the residual cylindrically averaged power spectra after GPR for the LOFAR20 dataset (left panel), the current dataset (middle panel), and the ratio between the two (right panel). The bottom row presents the ratio of the residual power to the thermal noise for the LOFAR20 dataset (left panel) and the current dataset (middle panel), accompanied by smoothed contour maps to emphasise the differences. In all panels, the foreground horizon line is indicated by a dashed red line. The significant reduction in residual power across the full k-space demonstrates the effectiveness of our improved data processing techniques.