Ceramic is the broad family; porcelain is one member of it. Porcelain clay is refined and fired at high temperature, creating a dense, low-porosity body that can be both thin and strong.
Why it matters for tea
A lighter porcelain wall responds quickly to temperature and presents the colour of the liquor clearly. A neutral glaze also makes it easier to compare teas.
Why it matters for coffee
A thicker porcelain cup stores heat and supports the texture of espresso or milk drinks. Shape influences aroma concentration as much as material does.
The best choice is not porcelain in the abstract—it is the right porcelain form for the drink and the ritual.