Italo-House and Hip House

I listened to some examples of both of these genres today trying to figure out a difference.  From what I heard there isn't much of one, except for perhaps where the artists are from.  They both have piano and synth hook chords and both can have rap elements.  Both have diva singing (or samples) and sort of gender-neutral soul-ish vocals.  I like and dislike examples of both.  Italo- does seem more upbeat and anthemic, whereas Hip House tends to be more edgy.  But there seem to be huge overlaps.
Here is a Chicago Hip House mix

(Hip House is most associated with Chicago DJs in the late 80s)

Here is an Italo-House mix (also called Piano House)

Italo-house is associated with the producer Gianfranco Bortolotti

In these particular examples, the latter is more atmospheric and instrumental.  There are a lot of mixes on Youtube and they vary all over the place.