What's the difference between voices and voices?

During assessment for bipolar some of the questions I was asked were around seeing and hearing things. When asked do you hear voices I said yes, but doesn't everybody? You know like the inner voice.

The last couple of days I've been contemplating what exactly is the diiference; what is considered a regular inner voice and what constitutes voices that perhaps aren't meant to be there? They dropped the subject and didn't ask any more but I have more than one inner voice, they have different accents and they argue with me and with each other. I'm not suggesting they impact on my life or anything but how can I respond accurately to the question if no one tells me what the norm is lol