Zucchini is a rapidly growing, prolific producer. Golden zucchini plants are much the same. There is some confusion about yellow squash vs. golden zucchini. The two are not the same and yet are similar, being classified as summer squash. The major difference between the two is that golden zucchini has the classic elongated zucchini shape and yellow squash has a fat bottom and tapers towards the neck or even curves like a swan at the neck.