Distribution of M₂₀₀ for the sample of 62 simulated haloes in our reference (AGN) run. Cluster names correspond to those given in Bonafede et al. (2011), with the addition of D25–D29, which indicate low-mass object re-simulations. The main haloes of each re-simulation are termed DXX–a (bold face), while their satellites are indicated with letters from –b to –e in decreasing mass order. The vertical dashed line indicates the mass limit of 5 × 10¹⁴ h⁻¹ M_⊙ used to separate groups (34 objects) and clusters (28). Objects marked in red correspond to perturbed (32) haloes, while black indicates relaxed (30) ones, as defined in Section 3.3.