Generally speaking, it is impossible to determine which brand is better because there are differences in product quality, price, market evaluation and other factors between different brands. However, the following information can be provided:

* Jingrun Pearl has a wide range of products, from fresh water to seawater, from pendants to earrings. Liu Fu jewelry, on the other hand, is dominated by seawater pearls, with relatively few kinds of products.

* Jingrun Pearl has a relatively low price and high cost performance. The price of Liu Fu pearls is relatively high, but the quality and gloss of their products are very good.

* Both brands of pearls are produced in Nanhai, but the quality of pearls produced by Lukfook Jewelry is better.

To sum up, it is impossible to determine which brand is better, because each brand has its own characteristics and advantages. Consumers can choose their own products according to their own needs and budgets.