<p>@Harvardreamss </p>
<p>In general, it is better to not repeat something already in your report. However, it is definitely not a put-off. If you think writing about your EC will better represent something more important about you, then definitely write about it. </p>
<p>What that somebody is meaning to say really is that your application is all that the adcom is going to see. You want to represent as much of the good in yourself as possible. Generally, it is wasteful to repeat anything anywhere. However, the essay is rather important, and you want to write something that represents you best.</p>