Notes. Common samples are defined as those PSZ2 detections with the given property that has a counterpart with that property in the PSZ1 2015. The intersection comprises those detections common to all three detector codes. Low reliability candidates possess a poor neural-network quality assessment flag. In the PSZ1, low reliability candidates possess the lowest external quality assessment flag. “SZ clusters” here means clusters with SZ detections in ACT or SPT. “PSZ1 2013” refers to the 2013 release of the catalogue (Planck Collaboration XXIX 2014), and “PSZ1 2015” to a recent addendum updating the counterpart information of the catalogue (Planck Collaboration XXXII 2015).