otksaunt,

Manufacturer's typically make the same products for the Big Box stores and indepepndant flooring retailers, however they often sell them under different names. Sometimes the product specs for the Big Box stores are changed just slightly to give them a cost advantage. So in your case the tile thickness could be the difference between the two. It could also be the identical product with no difference.

Hope this helps.

Jason Goldberg

Bottom line is to take 10 or 12 of the tiles and line them up vertically. See if there are noticable variations in the size. This will determine how well the grout joints line up. Also, eyeball down the edge of a few of them. Decent tile is FLAT. If they look "cupped," go somewhere else.