Projected spatial distribution of all particles (DM, gas, and stars) belonging to a subhalo identified by SubDLe (top row) and the matching subhalo identified by SubFind (bottom row) for three typical cases: in the left column, a subhalo with an extension of few tens of kiloparsecs, perfectly identified by SubDLe; in the central column a larger subhalo, spanning a distance of about 1 Mpc, where only the central nucleus is identified by SubDLe; and in the right column, a system of two close substructures that are combined into one subhalo in SubDLe’s catalog due to their short distance in comparison with the density grid resolution.