HouseEngine and ChilloutEngine are quite similar from the outside, because they share the same workflow ideas.
However, both tools contain completely different presets. The chord progression generators are different as well.
As the technical aspects behind the Engines are very similar, it is possible to use the tools side by side. You can copy a chord progression in the chords page of one product and then import it from the starting page of the second Engine. The different Engines also share a "Recent chord progressions" list.