That all do their job to produce results in terms of smooth, flat responses, Dirac Live is not necessarily better in that sense, but it does produce visibly better impulse response graphs, and consistent results after customizing the target curves. One just have to know how to do it, like clicking the right place on the UI at the right time. Mult EQ X, or even the $20 app is a little easier but Dirac is still better even for that, it only gets a little tricky if you use the bass control features and that's when I found clicking in the right place at the right time becomes an issue. To be clear, I have no experience with the AVR/AVP versions, though I would suspect the UI should work the same of very similar to the PC standalone version, that I have a lot of experience with.
If you have something that runs DL, don't give up, it really isn't a problem child as such, the extra attention required is just learning how to use it, and do not hesitate to contact their tech support, they will get back to you and help you with solutions, but at times it may take a few days, other times same or next day response. It is always best to attach screen shots to help clarify your issue(s).
I posted REW graphs many times on this forum, so my assessment on the effectiveness of smoothing the in-room responses in order of DLBC > Audyssey MultEQ editor app (with Ratbuddyssey) > ARC Genesis is based on REW/Umik-1 mic measurements, not subjective measurements.
DL is also the easiest, for customization, but gets slightly tricky in one wants to use the bass control, yeah, ouch it costs $350 for the license so users should spend the time to learn how to do it right.
