Valencia, which is the dominant fruit of Florida, is extremely juicy, composed almost 50% juice, but the fruit’s flavor is relatively undistinguished. Over the years, Florida growers concentrated on producing juice from Valencias. Today almost 97% of Florida’s oranges wind up in juice, and chances are good that you have never eaten a Florida orange. Nevertheless, you can still buy Valencia oranges in the supermarket, but they are usually produced from other parts of the world, such as South Africa. But they are not that tasty as compared to navel oranges.
In contrast, navel, which is the dominant fruit in California, is recognized as one of the world’s best-tasting oranges. Besides their flavor, navel oranges have several attractive qualities that made them so popular: they are frequently seedless, they are relatively easy to peel, and they have flesh that is firm rather than watery. On the other hand, when juiced, Navels turn bitter within half an hour. Thus, if you intend to juice the oranges , then the Valencia variety would be a better choice.
Originated from a chance mutation in the Bahia region of Brazil in the early 19th century, the navel quickly spread around the world.
Source: How to Pick a Peach