I wonder if a new design team is due to the fact that DC never credited Ironhead Studios for their work on the movie.
You can see the side profile looks different. More of a gradual slope of the cowl to the ear.
https://fandfcollectibles.files.wordpress.com/2016/07/batmanjusticeleaugecowl.png
I love the BVS cowl too. It's such a raw, simplistic costume that works. This JL cowl seems more streamlined. Probably to go with the fact that Batman is out of retirement now with no stubble. We'll see. I don't care for the pattern they added into his ab section. The thin wraps around the gauntlets are new also which you can see in the JL poster if you look close (I kinda like those).
They never changed a thing with Superman/Reeve's costume from 1-4. They just can't leave things alone can they.