1. Alcohol: 38%vol for 38 degrees Hailan and 42% vol for 42 degrees Hailan.

2. Taste and drinking method: 38 degrees of sea blue is soft and refreshing, suitable for cold drinks with ice, and the taste is clear; The 42-degree sea blue is stronger and more challenging, suitable for drinking with a small amount of water, and has a stronger and more mellow taste.

3. Market positioning and price: Haizhilan 38 degrees is mainly for the mass consumer market, and the price is relatively close to the people, suitable for social drinking occasions such as banquets and parties; 42-degree navy is more inclined to the high-end consumer market, and the price is relatively high, which is suitable for important occasions such as business and etiquette.

4. Packaging: 38 degrees and 42 degrees of sea blue are similar in packaging, but the colors will be different. The sea blue at 38 degrees will look lighter, and the degree marked on the package will be different.

To sum up, the degree, taste and drinking style, market positioning, price and packaging between 38 and 42 degrees of sea blue are different.