mIRC was designed for the former, that is, creating several event text triggers with different match text. However, these days, most people just lump all text triggers into a single On TEXT event, especially so they don't have to repeat / reuse lines of code that can all be used in a single common event.
It's really just up to you. Write it both ways and decide which styles you prefer or find convenient. Nobody sticks to just one method.
