Most people looking for a house curve are looking for a boost in bass response. This is especially desired when listening below reference level, which most people do. Engaging DynEQ will give you a boost in bass when listening below reference level, with the amount of boost determined by the MV level and the content itself. Think of DynEQ as a dynamic house curve.
Now if you listen at reference level then that goes out the window.
Can't think of DynEQ as a dynamic house curve, coz DynEQ has a somewhat different purpose, while AFAIK a house curve does not need to be dynamic.. A house curve is supposed to have a HF roll-off regardless of SPL, see how it developed from the X-curve. Meantime, DynEQ is supposed to take care of the characteristics of our ears where perception of frequencies depend on SPL. The softer the SPL the more our ears loose the ability to hear low and high frequencies. Really nothing to do with a house curve at all. A house curve (like Audyssey target) should be used for movies, while Audyssey flat is recommended for music. YMMV.