If you repost, only your profile name appears in a line at the top on Plebstr for example. If you quote post, we can see your profile picture and name as well as the comment you make and the original post. Maybe it’s a visual issue, for someone that is following a lot of people and has a busy homepage it’s not easy to notice the profile name without a picture for a repost while scrolling down quickly to catch up with the feed or find something interesting.