I know that I owe you a more definitive answer on the Therium/Silvergarde comparison, but with the new kittens (monsters), I don't dare not being able to hear anything that they are getting into at ALL TIMES. So I haven't listened to any of my personal gear for longer than I like to think about. I don't know how to insert a link to a post in a different thread. But I think you can find the original post from the 846 thread by looking at post history in my profile. Personally I like my Silvergarde over my 8 Wire Therium. What I explain in the post that the below quote comes from pretty much sums up what I experienced the one time that I did some cable/IEM swapping. The Silvergarde added a level of detail that I had not heard before from the 846's, which I had primarily paired with my Therium cable.
"What I wanted to convey is that I experienced a Holy Crap moment yesterday using a 846/Silvergarde combo with my X5. Very Pleasantly Surprised!"