Though they definitely share production methods and tone and meter, TripHop is traditionally used when the artist is being experimental with form and and tone,

Though they definitely share production methods and tone and meter, TripHop is traditionally used when the artist is being experimental with form and and tone, often within the confines of a single track. There might even be a structure resembling verses and choruses. LoFi/Chillhop is more along the lines of Ambient, with much less overall variation of tone/structures during the track or between tracks.