According to a check of what's worth buying, Dole and Cannon are both internationally recognized fruit production and distribution groups, both with long histories and high-quality products. It's not easy to generalize about their grade levels, as they differ in their product range and market positioning. However, I can make some simple comparisons in the following aspects:

1. History: Founded in 1851, Dole is one of the world's oldest fruit companies with more than 170 years of experience and heritage. Founded in 2002, Cannon is a leading company in China's fresh food supply chain service industry, with more than 20 years of development and innovation. Historically, Dole has a higher class, more brand influence and reputation.

2. Products: Dole's main products include bananas, pineapples, grapes, berries, citrus and coconuts, covering a wide range of tropical and subtropical fruits, as well as canned fruits and juice drinks. JANO's main products include bananas, apples, pears, grapes, kiwi fruits, oranges, lemons, etc., as well as meat, seafood, and snack foods. In terms of products, both Dole and Jannong have rich categories and high quality, but Dole has more advantages in tropical fruits and Jannong has more advantages in domestic fruits.

3. Markets: Dole's markets are in more than 90 countries and regions around the world, and it is one of the world's largest fruit producers and sellers, with sales of more than 4 billion dollars a year. Cannon's market is mainly concentrated in China and is one of the largest fruit suppliers in China, with annual sales of more than 1 billion dollars. In terms of market, Dole is more upscale and more internationally competitive and influential.

In summary, Dole and Jannong are both trustworthy fruit brands, but in terms of history, product and market, Dole is of a higher class and more internationally recognized and reputable. Of course, it doesn't mean that Gagnon's fruits are not good, just that there is still a gap in terms of brand image and market share. Different fruit brands may have different characteristics and advantages, consumers can choose the right fruit brand according to their own preferences and needs.