For the answer to the question above, Keats' Ode shows you many different aspects of Autumn: - the weather, the fruit, the birds, the flowers, the bees. He also gives you a sense of what is still to come (they think warm days will never cease: - but we know better). It is keenly observed and rich in detail: it is poetry.
Susan Swett's poem is really not much more than a list of flowers and colorful wildlife: dragonflies, cornflowers, butterfly, poppies. It is the kind of prettified 'impression' of July that one would expect on a greeting card. I hope this helped