No. That is the one thing this service is not for, and it is written into the Acceptable Use Policy as a breach.
A concept frame is a picture of a direction. It is made in seconds from one line of text, by a machine, with no art direction and no checking. Look closely at any of them and objects stop resolving, structures stop making sense, and detail turns to texture. It will not survive being printed large, and it will not survive a client looking at it twice.
Every export carries the mark “Concept — AI generated” composited into the image data itself, at the moment the file is written on our servers. There is no setting that removes it, and removing it by editing the picture is a breach of the Terms.
The difference is what the picture is for. A concept exists to make somebody understand what you are talking about, so that the real thing can then be commissioned, shot, built or designed properly. Finished work is the real thing. This service makes the first, so that you can go and get the second.