The difference between the two brands of wine lies in their different origins, different raw materials, and different trademarks.

1. Different origins: Dukang is produced in Luoyang, Henan, while Baishui Dukang is produced in Baishui County, Shaanxi.

2. Different raw materials: Luoyang’s Dukang wine is a single-grain strong-flavor wine, with only sorghum and wheat as raw materials. In addition to the first two, the Dukang wine of Shaanxi Baishui also contains peas and wheat.

3. Different trademarks: Henan's Dukang wine only has two characters "Dukang", while Shaanxi's Dukang wine has four characters "Baishui Dukang".