2 Items who just look exactly the same Why?

I noticed something odd in the game in the selection floor tiles you can buy the Glitter floor for 2 gems for one floor tile, and you can bye at the wall selection a floor tile called: Glitter for 500 coins, and the surprising same is they look exactly alike.
How can this be?and why not remove one of them if they look just exactly the same?
Why is that so?
I am just curious about it thats all and thats why i opened this thread and i hope i get answer to it, because it really made me wonder.

Thx.

The first tab, which is walls and flooring, sells the regular glitter tile that your club comes with. The next tab is for dance tiles, which pulsate to kusic and can be danced upon.

I have been "advertising" on my wall to my dancers that my black galaxy floors are "danceable". It's amazing how many do not realize the differences between the menus. I'm happy to let my visitors know these differences and most appreciate the info