Multicharge vitrified tiles

[rkrishna]

We ordered some border tiles and it looks to be multicharge vitrified tiles.

http://www.cengrestiles.com/index.php/c ... ge/id/112/

What is the difference between multi charge and double charge? Or is it just a marketing term?
http://en.wikipedia.org/wiki/Vitrified_tile

[new_house]

after some it will be marketed as "mega charge".