Look Carefully
One is Manolete, 2008 and then another in Brooklyn, 2015, you can have a clear look at how much same both the dresses are in the pictures.

Very Close
The costume which was used in the movie My Cousin Rachel, 2017 was again used in the movie Victoria, 2017 which is very much similar.

Almost Similar
Actress in both the movie wore an almost similar outfit which generally audience doesn't notice but it is revealed that in Gossip Girl, 2010 and in the movie The Carrie Diaries, 2013.

Hard To Notice
Take a keen look to it and you will find that these two actress are wearing almost similar dresses which may happen that creators might have failed to realize it , the picture on the left is from the movie Pride & Prejudice, 2005 and the picture on the right is Sense and Sensibility, 2008

Slight Difference
In the movie Pride and Prejudice and Zombies, 2016 the dress seems to be light in color and in the movie Mary Shelley, 2018 dress of same pattern have been used but slightly of different colour.

Same Costume
In the movie Isabel, 2014 the character is wearing a kings outfit and you will find the same pattern of dress in the movie The Hollow Crown, 2016.

Creator Failed At This Point
Sometimes creators fail to realize the errors which when movie gets release then it is noticed, here also the same thing has happened and that can be noticed in both the movies The Duchess, 2008 and The Scandalous Lady W, 2015.

Figure It Out
In both the movies Elizabeth, 1998 and Camelot, 2011 the character can be found wearing similar dresses and the appeal is the same

Can You Believe It
Dangerous Liaisons, 1988 and Hocus Pocus, 1993 are some movies which is known, in the given picture you will find character wearing a light white and creamy dress and irony is it is same in both the movies.

Costume Repeated
There is one possibility that creator might be shooting in the same studio where the movie was shot and might have taken same dresses without checking, Head in the Clouds, 2004 and Race, 2016 contains this character in same dress