The main difference between an argumentative essay and an explanatory essay is that an explanatory essay

The main difference between an argumentative essay and an explanatory essay is that an explanatory essay "provides information about a subject without offering an opinion".

Explanation:

Explanatory essays describes the core concepts and demonstrate them without giving an opinion. The argumentative essays carry a particular stance and are intended to be persuasive. Its principal objective is to express a conclusion of view on the matter. But several literary scholars believe these two kinds of essays overlap. The expository essay comprises only details which explains the subject matter, although the argumentative essay incorporates statistics, facts and specific thoughts of the writer.