"the virus is still a coronavirus"

That's always something i wonder every time i read about covid-19 : are we sure that those effects aren't also observed with other coronaviruses, maybe on a different intensity, but we just never had so much scrutiny for thoses virus as we have on this one in particular ?

Diarrheas etc are common symptoms of many viral infections, and people die from side effects of the flu or the cold every year ( old people most of the time).

Is the difference qualitative or quantitative ?