totally agreed - it's the way of understanding the music more than a definition of some style.
..like in trance you can hear many different sounds - ethno/tribal goa, jazz samples over ausie psy progressive (like zenon etc), weird suomi disko and so on. Trax seem quite different, but they all are trance musik, so the same with IDM - some of the stuff sounds more like minimal dub, some - academical music over clicks n'cuts or like yagya - minimal ambient..
by the way, today Sutemos netlable are throwing a party in my hometown (Vilnius/Lithuania) and Yaga will be playin Live as well