Performance comparison between the VISIONS pipeline and the CASU infrastructure for a randomly selected tile in the VVV survey. The four distinct groups show histograms and spatial variability in the Galactic frame of coordinates relative to Gaia (top panel groups), K_S -band photometry compared to 2MASS (bottom left), and the reported image quality parametrized by the stellar FWHM (bottom right). The red and blue histograms show the respective measurement distributions for the VISIONS and CASU pipelines. Concerning the spatial distributions, the panels on the bottom left and right-hand side show the properties derived by the VISIONS and CASU workflows.