The objective of argument writing is to prove or disprove the thesis. Using evidence and reasoning the author must demonstrate the truth of the thesis.
In persuasive writing the focus is to coax the reader to accept the author's idea or point of view. Persuasion aggressively seeks to sway the reader's opinion and provoke action based on the author's validity.
The thesis must be something that can be disputed, disproved or proved. In argument writing the thesis must have fact that supports its claim. The author presents evidence and research as proof.
The persuasive paper, however, relies on logic as a particular method of reasoning. Logic demonstrates a proper conclusion can be drawn from the the author's suggestions.
An argumentative piece takes a formal tone. Using research and scholarly sources implies the author has knowledge of the subject. A formal tone avoids discrediting a fact or statement. The author must keep a simple voice to convey accurate information.
Using persuasion, a writer may take a more personal approach, using second and first person to be speak directly to the reader.
After moving from general information in the body, the conclusion returns to the thesis and restates supporting points. Argumentative writing must confirm the evidence that proves the thesis statement.
In persuasion the conclusion addresses the author's intent; why the reader should agree with the author's position. Finally, the closing remarks may call for action and future possibility.