What is the fine-grained topic of the following text: Riesling fruit coming in is bright with high acids, lower sugars in the 18-20+ brix range, and with good flavors — Riesling has two aromatic/flavor peaks, one at 18-18.5 brix and another at 21+ brix. Only return the topic.
Riesling Fruit Characteristics at Different Brix Levels