Both superhero films opened to unfavorable reviews so I wonder which one looks better compared to the other.

Between FF and BvS, which one is the best film, or the better film?

I will say Batman vs Superman is the better film. If you turn off your brain, you can at least enjoy the action bits but FF will bore you to death

So unnecessary

Batman V Superman, by a long shot. I'd give it a 5.5/10 at least.

Fantastic 4 on the other hand....

Fantastic Four was a complete disaster (way over budget, not very good, bad special effects not a really good cast etc) plus it bombed at the box office. Batman VS Superman was only a minor disaster although most critics didn't like it most of them liked at least some aspects of the movie, with Fantastic Four critics hated the entire movie, plus it actually made money at the box office.

The answer is obviously Batman V Superman. Even with all the issues it had, it was still fun to watch, while Fantastic Four was just...ugh.

I didn't see Fantastic 4. Batman vs Superman at least was visually enjoyable, so I'd have to assume BvS takes this. On the other hand though, I kind of have a thing for Kate Mara...

Batman v Superman had it's issues but fantastic four is garbage.

BvS was meh. But Fantastic Four was one of the worst movies I've ever seen.

I didn't like either but I think Fantastic Four was less of a chore to watch.