This depends on whether or not you think that different races enter sub-space using different methods. Or, perhaps you think that there is only one way to access sub-space, and thus each race's technology is similar in terms of what it does.
As far as we know, the blue effect is a product of the process of entering sub-sapce, not a signature of the technology involved (though of course the Knossos effect is green and contradicts that idea). I personally don't think the Shivans would look or act any different from us or the Vausdans when using sub-space technology, because sub-space is sub-space from wherever you sit. The whole Knossos thing is a bit different, though, since the technology is barely understood, but if the visuals are different than I think it's reasonable to say there might be a different sound effect too. Not that you'd acually be able to hear it in space, but hey
