The following are the differences between a topic outline and a sentence outline:
1. The topic outlines are not much informative. Whereas, the sentence outlines are plentiful informative.
2. There are fewer words in the topic outline whereas, sentence outlines present the opening sentence of every paragraph.
3. While the topic outline can provide us only with a topic and no more details, the sentence outlines can provide us with a work that we can use in writing the main body of a paper.