The 5 seater is different from the 7 seater, at least in the 2nd row, as the 5 seater has fixed 2nd row while they move in the 7 seater. There have also been changes in the 7 seater over the years so I would believe the year designation from the seller of the mats.
Also, if you have recently ordered your model X we are already into the 2021 model year.