Concrete is harder than tile because it was designed for heavy-duty usage. There’s a reason why parking lots and warehouses have concrete floors and not floors made from tile, hardwood, carpet, or other popular flooring materials.  That’s not to say that tiles aren’t hard. Porcelain tiles in particular are known for being incredibly hard, but their hardness doesn’t compare to that of concrete.  Imagine if you were to drop a glass on a floor made of tile versus one made of concrete. In either scenario you’ll end up with one shattered glass, but a tile may not escape unchipped.