The title denomination does not matter. What it matters is that the four films in this collection are in actual continuity with each other, unlike the entries in the Z collection. For more information you can consult the Contribution Bible.

https://www.themoviedb.org/bible/collection

Thanks Mike, but why should we change what the creators of the movie decided?

http://www.toei-animation-usa.com/dragon-ball.html

That is the official web of Toei Animation, productors of the movies.

You can clearly see there that both films belong to Z series, not super.

I understand using the continuity rule when there is some kind of doubt about where to put them, but if Toei Animation says they are Z movies, where is the doubt?

We follow the site guidelines not Toei's.