Both in the box office and the critics' reviews?
Just what you think for now... we can revisit this when the time comes.
Many are praising BvS based on the latest trailer alone, and with the Trinity finally in the same movie(outside Lego the Movie lol), it may easily earn a lot of money from the get go. Question is, will Civil War earn more, esp. with how Stark/Cap are already well known to the viewers + the first appearance of Spidey in the MCU?
Would have been interesting if Warner didnt change the release date of BvS. But nonetheless, the two are just 1 month and a week away from eachother, and many will see comparisons(top heroes fighting eachother).