Why are some green tea not and are?

It seems like you might be asking about why some green tea is "not" and some is "are". This is a bit confusing!

To help me understand, could you please clarify what you mean? Here are some possibilities:

* Are you asking about the taste of green tea? Some green teas have a grassy, vegetal flavor, while others are sweeter, more floral, or even slightly bitter.

* Are you asking about the processing of green tea? Different processing methods (like pan-firing or steaming) can lead to different flavors and textures.

* Are you asking about the health benefits of different green teas? While all green tea is good for you, some varieties might be higher in certain antioxidants or have different medicinal properties.

Please give me more information about what you're curious about, and I'll be happy to explain!