Differences in Lingonberries (Vaccinium vitis-idaea)
I recently went out and picked some lingonberries. There were two distinct patches from which I harvested two different kinds of berries. To the untrained eye, both areas had the same amount of shade and were roughly 10 meters apart. The leaves for both plants look the same and there was no noticeable difference between the plants.
The darker berries were larger than the brighter berries, and when cut open, the flesh was also a darker red. It was harder to distinguish where the seeds were located. There was also no taste difference between the berries.
My working theory is that one patch of berries does get more sun than another, this activates more of the red pigments known as anthocyanins. They may have tasted the same because it had been several days after the first frost when these berries are supposedly ripe. Another theory I developed was that the darker berries were overripe compared to the bright red ones. This idea, however, would not explain the difference in size. CM Fairbanks
HortAlaska Berries 
ts a matter of ripeness, and you have found two patches that ripen at different times. The berries go from green to whitish green to red on top/green on bottom, to all red to all burgundy. The burgundy ones are full ripe. The red ones, while edible, are not quite ripe. They are not as soft, though, and lots of people prefer picking when they are all red. I prefer the all burgundy.
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