Porcelain is denser and absorbs less than half a percent of moisture, making it frost proof and suitable for outdoors. Ceramic is more porous, primarily used for interior walls or low traffic areas for aesthetics.

PEI ratings measure surface wear resistance, ranging from zero (wall only) to five (heavy commercial). Slip ratings, like DCOF, indicate traction; higher numbers are essential for safety in wet zones like bathrooms or outdoor entries.

Generally, floor tiles can be used on walls, but wall tiles should never go on floors. Wall tiles are thinner and lack the structural strength or slip resistance required to withstand heavy foot traffic safely.

Reputable brands offer superior quality control, ensuring consistent thickness, dimensions, and color across batches. They often use advanced printing technology and offer warranties, whereas local generic tiles might have higher defect rates and limited availability.

To ensure consistency, check the dye lot and caliber numbers on every box. Branded tiles from the same production run share identical shades and sizes, preventing noticeable variations when installed across a large surface area.