system
A chat on subreddit /r/me_irl
human
The labels also seem to correlate to the actual fruit juices used in each. Note how the can doesn't have an apple front and center (and includes no apple juice).
gpt
It's to try and trick the brain into searching for that flavor, so the apple forward marketing is to downplay the other flavors and search for the sweet 'apple' flavor, while the orange forward marketing is downplaying the general sweetness and encouraging a search for balancing citrus elements.

But nobody REALLY looks at the label so everyone just bitches it all tastes different because of the many reasons it does including different recipes to balance the flavor across different containers.