Those two materials look very similar, but they have some differences. When considering which material is better for the outside or inside you have to know that porcelain tiles are denser and less porous then ceramic tiles. This means that porcelain tiles are better for the inside and outside use. On the other hand, ceramic tiles are more porous and recommended for heavy traffic surfaces like kitchen and floors. It is recommended for interior floors and walls. Ceramic tiles are easier to repair than porcelain tiles. The cost of installation is almost the same, however, porcelain can be a little bit more expensive. Because it is harder to cut and difficult to work with, professional installation is needed. Ceramic tiles are easier to work with and cut. Another difference is the heat resistance, ceramic is heat resistant but not heat proof, which means that extra heat can damage the surface and shape may change. Porcelain is less likely to crack if exposed to extreme heat. Due to its porosity, ceramic has a high absorption rate more than porcelain.