Notes from the Biking Broker: Porcelain Vs Ceramic?
Porcelain V. Ceramic
Both can be used in home renovations, and both are manufactured with different types of clay. The real difference is in their levels of permeability... specifically, in terms of water absorption. Porcelain tiles absorb less than 0.5 percent of water. Ceramic and other non-porcelain tiles absorb more than 0.5 percent water. This means Porcelain is more dense, less permeable to moisture, and more resistant to overall wear and tear.
This means for areas with water (bathrooms, kitchens, outdoor) and high-stress, you should often think about choosing Porcelain rather than Ceramic.
But Porcelain is typically more expensive (often double the price), and if you are interested in doing your renovations yourself then it is important to note that Ceramic is far easier to cut and shape and affix without special tools or professional experience... which means if you are on a Budget or choosing to DIY, then Ceramic might actually end up being the right choice.
Read more about this topic here