Paul got in some skiing last weekend along with some Sparks Swigging and had a chance to compare the 6.0 varietal to the 7.0.
As I understand it, the number stands for the alcohol percentage. As Paul points on on Flickr, the 6.0 is orange while the 7.0 looks like something that ended up on Bill Murray in Ghostbusters.
I haven’t tried the 7.0, but have rocked the 6.0 hard in the past at a wedding. It did not disappoint.