The difference between autotrophs and heterotrophs are:
Autotrophs
(a) These are organism which can prepare their food from simple raw chlorophyll II and sunlight.
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(b) Autotrophy can be photosynthetic or chemosynthetic.
(c) They are known as producers.
(d) For example, green plants.
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Heterotrophs
These are organisms which cannot prepare their own food and are dependent on others for nutrition.
Heterotrophs can be herbivorous, omnivorous, carnivorous, parasitic or saprophytic.
These are known as consumers.
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For example, humans.