Plain and decorated variants of 'Lotta Glaze Tiles' are listed separately

There are two floor tiles in the base game that share the same name, Lotta Glaze Tiles, but are considered two separate items in the catalogue. One is plain and the other one has some decorated tiles.

There is also a similar flooring, Lotta Terracotta Tiles, that has plain and decorated versions, but they are grouped as different swatches under one item.

I assume this should also be the case with the Lotta Glaze Tiles, especially since they already share the name and visual design, much like its terracotta versions.