Bulgari and Van Cleef & Arpels are both very famous jewelry brands, and their products are of very high quality and design. If you want to choose one of these brands, you can consider the following factors:

1. Price: Bulgari's product price is relatively low, while Van Cleef & Arpels' product price is relatively high. If your budget is limited, then Bulgari may be a better choice.

2. Design: Both brands have excellent designs. If you pay more attention to design, you can choose one of the entry-level models, such as Bulgari's spring necklace or Van Cleef & Arpels' basic four-leaf clover necklace.

3. Quality: Both brands have high-quality products. If you pay more attention to quality, then you can choose a brand of high-end products.