I don't know if you plan to actually market yourselves as a "better Dropbox". But if you do, you should make the differences (and similarities) much clearer. As

I don't know if you plan to actually market yourselves as a "better Dropbox". But if you do, you should make the differences (and similarities) much clearer. As someone who understands what Dropbox is, the sentence you wrote above is excellent: I know exactly what you are (like Dropbox), but also where you're better.