Originally Posted by
dulciusexasperis
Not all plane configurations even have Premium Economy seats. Look at the configuration of the seats on Air Canada's two versions of the A330-300 here:
https://www.seatguru.com/airlines/Ai...bus_A330_B.php Version 2 has 21 Premium seats while version 1 has none at all, replacing them with more Business class seats.
Seatguru is notoriously inaccurate. In this case, all A330s were refitted last year with Premium Economy. The Version 2 you see on Seatguru is the current config and Version 1 is the old config which no longer exists. All Mainline & Rouge widebodies offer Premium Economy nowadays.