incidentally BP1 pts get psychosis more often, so if you don't have it i.e. never or in general then you are 2, but in 2 there are also long periods of depression or more precisely you can say the depression is the issue not the mania. Also 2 get hypomania only not a full blown mania, but as IL said no gradation scale to measure that. Also in 1 sometimes it statrs as happy then turn after a while with anger (mixed states).
remember there is 1,2,3 (cyclothemia), 4 etc..