Okay, so let's comapare.
From dictionary.com: 
Vegetable: A plant cultivated for an edible part, such as the root of the beet, the leaf of spinach, or the flower buds of broccoli or cauliflower. 
The edible part of such a plant. 
A member of the vegetable kingdom; a plant. 
Offensive Slang. One who is severely impaired mentally and physically, as by brain injury or disease. 
One who is regarded as dull, passive, or unresponsive. 
Fruit: The ripened ovary or ovaries of a seed-bearing plant, together with accessory parts, containing the seeds and occurring in a wide variety of forms. 
An edible, usually sweet and fleshy form of such a structure. 
A part or an amount of such a plant product, served as food: fruit for dessert. 
The fertile, often spore-bearing structure of a plant that does not bear seeds. 
A plant crop or product: the fruits of the earth. 
Result; outcome: the fruit of their labor. 
Offspring; progeny. 
A fruity aroma or flavor in a wine. 
Offensive Slang. Used as a disparaging term for a homosexual man.