Ocean Waves is a coming of age tale centered around Taku, an ordinary high school student, his best friend Matsuno, and Rukiko, a reserved outcast who has caught Matsuno's eye. While bounds of friendship are tested, unlikely relationships grow and flourish in this made for television movie.
Whisper of the Heart is a touching Ghibli slice-of-life story, about a young girl named Shizuku. While riding the train, she notices a fat cat riding alongside her. Following the cat, she finds a shop where she is told an enchanting story of a gold statue named "The Baron". WotH follows Shizuku in her struggles to grow, and her budding love with the shopkeeper's son.
Nao and Miki are the sole members of their school's photography club, and have discovered the hidden secret of the wind. With the help of Mr. Taiki (a member of the ancient clan of the "wind-handlers" and one of their teachers) the duo soon pick up the secrets of controlling the wind and seeing it in its perfect beauty. With flying cats, lost tree squirrels and photography contests to boot, there's wind to be seen in any situation...
If you can tolerate the slow pace of either Windy Tales or Ocean Waves, and are a fan of this type of slice-of-life, you should definitely try out the other. Both are a really pure slice-of-life anime, with realistic characters and understated events, and neither goes out of their way to be funny/pander to a wider audience.