Hi Davidri:
I currently own the Spiral Groove SG1 table. I compared it to a number of contenders, it was my favorite. It transformed my analog system.
The sound of the SG1 and SG2 is quite similar, as I auditioned them at a show. From my limited perspective, the SG1 table had a bit more "effortlessness" and "bass Impact". However, both are outstanding product.
I compared with tables from Basis, Continuum Criterion, SME 20 & 30.
Here is a link for a review of the SG2 in the latest issue of tone audio magazine (make sure you download issue to read review). It won analog product of the year.
http://www.tonepublications.com/ToneAudio/Home.html
Hope this was helpful