Comparison between IRFs of LHAASO-KM2A (Cao et al. 2024b) and the on-axis ones of CTA (north and south) (Cherenkov Telescope Array Observatory & Cherenkov Telescope Array Consortium 2021) and ASTRI (ASTRI-Project 2022), as indicated in the legend, which applies to all panels. (a) 1-σ width of the PSF approximated as a Gaussian distribution. (b) effective area, (c) background rate, and (d) energy resolution. The drop observable in the last point of the CTA-N effective area is an artefact of the simulations, resulting from a statistical fluctuation.