Also, as someone (BWM?) noted, the borders between the bozouki (well the so-called Irish version), octave manodlin/mandola (depending on your terminology) and the cittern (at least modern ones) are a bit blurred. Scale lengths and I think the one usually called a cittern uses 5 pairs of strings? but they are all basically adaptions of the same designs.

In terms of Irish music, as far as I know the one called the bozouki tends to be favoured by those who are primarily accompanists. The slightly shorter scale of the mandola makes it easier for playing melody in GDAE tuning (bozouki players may prefer the GDAD or ADAD).

I think...