The main difference between porcelain and ceramic tile is the rate of water they absorb. Porcelain tiles absorb less than 0.5% of water whilst ceramic and other non-porcelain tiles will absorb more. This is down to the stuff used to make porcelain tiles. The clay is denser and so less porous. It affects how the tiles behave, and what they’re best used for.
Lappato (Semi-Polished) Finish: Semi-polished, also known as "Lappato" finish, is achieved by polishing the tile's surface with an abrasive wheel but not long enough to attain the luster of a typical polished tile.