How can you even say "the concertino is the winner here by a wide margin" ???? You can't compare two completely different sounding speakers and say one is the winner by a large margin. If you like it better, that's fine, but it's really annoying when people throw around inaccurate and meaningless blanket statements.
Do you not value transparency at all? Any SF speaker is not what you could call a transparent speaker, especially their cheaper ones. If you're looking for a warm halo around your music, then SF is your speaker. But these little quads disappear MUCH better than the SF.
Mpedris - Both of these speakers are quality for the price. However - they do have very different presentations of music. If you're looking for a warmer sound with a weightier midrange, you'll be happier with the SF. However, if you're not looking for additional warmth and would prefer a speaker with less-apparent colorations that allow you hear more of what your electronics sound like, go for the Quad.
For my money, it's the Quad, especially if you have good sounding electronics.