More than one article out there links #BipolarII with #AtypicalDepression. Hmm.
People with so-called atypical #Depression - those who tend to sleep more, eat more, be anxious & rejection sensitive - also tend to have a mood which improves fairly quickly when life goes their way. This is claimed to be similar for people diagnosed with #Bipolar II.
There is a lot of phenotypic overlap between people diagnosed as one or the other. Maybe they're pretty much the same thing, maybe it's a spectrum.