These are "white" Astrian dessert wines. They are definitely sweet and in general as the number increases, the wine becomes thicker. As a side note, these generally retail around $60. Binny's has been closing them out around $30 for about a month, but $24...
I believe they would go well with Creme Brulee, and may suggest the #7, it is a blend of Chradonnay and Welschriesling. Though, others may have better suggestions.
...I'll bring the Kracher, you bring the Creme Brulee