I hate to say this, because I am a fan of Darjeeling, but to me, it just tastes lighter, not really significantly different. This is when I have tried a green from the same estate and flush as a "black" that I have on hand.
However, they are still generally good as long as they are fresh. I remember one of the first greens I had, I got from Stash direct... it had NO FLAVOR AT ALL. I think it was just old.