I have a Brandywine tomato plant, and have so far harvested four tomatoes from it. Two of them are as I would expect them - deep rosy pink when ripe, and with a rippled appearance, like a pumpkin (not smooth, is what I'm trying to say). But the other two I've picked have ripened to a real "classic" tomato red, and have a round, smooth shape. Is this normal to get such variation from a single plant? The seed came from my parents, who grew them and saved the seed from last year.