In conversation they all get called tile, and they all promise to outlive the person buying them. On the roof they behave like three separate materials, with different ways of ageing and different reasons for failing early.
Choosing well has less to do with which one looks best on a sample board than with grade, colour chemistry and one layer underneath that nobody sees.
With Slate, the Grade...
Arabic
French
Spanish
Portuguese
Deutsch
Turkish
Dutch
Italiano
Russian
Romaian
Portuguese (Brazil)
Greek