You may wait a rather long time to get any responses on this forum for such a brand specific question.
Try the Audiogon and Linn Topica archives and post your ? there...may bring more feedback.
Here's a route to the Linn site....http://lists.topica.com/lists/linn/read?start=26870&sort=d
Good luck.
PS From my reading you will find the 2.1 an upgrade....but I've only heard the SC!