Ratios of the number of detected sources as a function of magnitude between our PSF photometry and CASU aperture photometry catalogs for representative fields in the VVV outermost bulge (left panel), VVV innermost bulge (middle panel) and VVV disk (right panel). The analyzed VVV fields are the same as in Fig. 3. Our PSF photometry reaches dimmer detection limits, by as much as ∼1−1.5 for the most crowded region in the inner bulge. The completeness is also higher over most of the magnitude range for all the different filters, and in all the different regions surveyed, while maintaining small photometric errors (see Fig. 3). The higher detection ratios with aperture photometry at the bright end are due to the use of a more conservative saturation limit with the PSF photometry.