Two movies with almost the same name and plot are released together.
Overlord (2018) was released on 9 November 2018 in the USA and produced by J.J. Abrams who is a well-known director and producer in Hollywood. A second movie is Nazi Overlord (2018), released on 13 November 2018 in the USA and produced by not so well known people.
A similar situation was with Operation Dunkirk (2017) and Dunkirk (2017).
From the synopsis, both movies have almost the same plot and name.
This related question is about twin films whereas I am asking about low production studios making intentional releases shortly after the release by a big banner.
What's the point of releasing such similar movies at the same time?